ライフサイエンスコーパス: pollen grain

1 nit dedicated to the development of a single pollen grain.

2 ritical role it plays in the survival of the pollen grain.

3 f microspores, each of which develops into a pollen grain.

4 /or the positioning of the MGU in the mature pollen grain.

5 ellular tryphine layer that coats the mature pollen grain.

6 d together to give rise to a viable, fertile pollen grain.

7 r microspores, each of which develops into a pollen grain.

8 give rise to a three-celled gametophyte, the pollen grain.

9 two pore-like apertures at the poles of the pollen grain.

10 angiosperm plants is a two- or three-celled pollen grain.

11 AtGATL4 expression appears to be confined to pollen grains.

12 aments, defective carpels, and dysfunctional pollen grains.

13 ls in Arabidopsis suspension cells and poppy pollen grains.

14 scopy revealed a collapsed morphology of the pollen grains.

15 specialized cell types such as hydathodes or pollen grains.

16 ltimately in anther rupture and dispersal of pollen grains.

17 addition, strong expression was observed in pollen grains.

18 s with short styles, long anthers, and large pollen grains.

19 KF1 promoter directed high GUS expression in pollen grains.

20 on the extracellular pollen coat of maturing pollen grains.

21 ctivity is localized predominantly to mature pollen grains.

22 ents of the extracellular tryphine of mature pollen grains.

23 re produced stage specifically by developing pollen grains.

24 Pollination presents a risky journey for pollen grains.

25 cy also reduced starch content in leaves and pollen grains.

26 the outer shells (exines) of plant spore and pollen grains.

27 mains that form on the surface of developing pollen grains.

28 rucial for their ability to mechanically fix pollen grains.

29 ees to catch and release large quantities of pollen grains.

30 stitution and the production of diploid (2n) pollen grains.

31 ith P12-BnCysP1 failed to produce functional pollen grains.

32 plays smaller and paler anthers with aborted pollen grains.

33 opologies, such as the spherical surfaces of pollen grains.

34 the homogalacturonan was higher in pme48-/- pollen grains.

35 s such as bacterial cells, fungal spores and pollen grains.

36 second most expressed PME in dry and imbibed pollen grains.

37 nce that HPC is able to reduce the amount of pollen grains.

38 organs, AtRPL10C expression is restricted to pollen grains.

39 nther, producing neither microsporangium nor pollen grains.

40 ith the different lipids isolated from olive pollen grains.

41 ds to the formation of diploid and polyploid pollen grains.

42 ripidae were covered by abundant Cycadopites pollen grains.

43 ferent expression pattern, being specific to pollen grains.

44 In pollen grains, a phase separation of extracellular mater

45 Here, we show that tobacco pollen grains accumulate phosphorylated and nonphosphory

46 ated and occurs in vivo only when desiccated pollen grains acquire water from the female, thus enabli

47 The early postpollination stages of pollen grain adhesion, pollen hydration, pollen tube pen

48 etophytes and acts as a natural protector of pollen grains against various environmental and biologic

49 ments; these environments discriminate among pollen grains, allowing only those that are appropriatel

50 % of GFP-synthesizing pollen based on 30,000 pollen grains analyzed per event.

51 ency of 56.6%, based on four plants and 1306 pollen grains analyzed.

52 male germline and the formation of a mature pollen grain and a functional phase representing the pol

53 nts, immotile sperm cells develop within the pollen grain and are delivered to female gametes by a po

54 ecular pathway of TE siRNA production in the pollen grain and demonstrate that siRNAs produced from p

55 opose a model of starch synthesis within the pollen grain and discuss the nutrient transport route fe

56 presence in the cytosol and cell wall of the pollen grain and the growing pollen tube of plasmolyzed

57 ivated Ca2+ channels from Lilium longiflorum pollen grain and tube tip protoplasts.

58 e in various tissues, most abundantly in the pollen grain and tube, and encode a protein that is a ty

59 en-associated viruses hitchhike on or within pollen grains and are transported to other plants by pol

60 nts, as well as in the vegetative nucleus of pollen grains and in dedifferentiated plant cell culture

61 ys that monitored adhesion of populations of pollen grains and individual cells.

62 d to the nucleus and cytoplasm in developing pollen grains and later to the apical domain in growing

63 specialized collection and transportation of pollen grains and likely gymnosperm pollination by 110-1

64 e are expressed in sperm cells of developing pollen grains and pollen tubes in Arabidopsis.

65 larged endothecium, and vacuolation affected pollen grains and resulted in the irregular shape or col

66 ion in seedling height and produced aberrant pollen grains and short siliques with aborted embryos, s

67 ganic and carbon-based materials, namely the pollen grains and spherical graphite, exhibited a signif

68 are regulated by rapid communication between pollen grains and stigmatic papillae and are fundamental

69 ted partial fertility with even fewer normal pollen grains and tetrads than those of the 35S::ASK1 li

70 1 mutant, although the percentages of normal pollen grains and tetrads were reduced.

71 Here we show that pollen grains and their extracts contain intrinsic NADPH

72 e previously characterized H+ fluxes in lily pollen grains and tubes, as well as the poor anion selec

73 erization of F-actin in populations of maize pollen grains and tubes.

74 ice plants had reduced proportions of viable pollen grains and were male-sterile, but were able to pr

75 were expressed to very high levels in mature pollen grains, and are potentially involved in the self-

76 ous environments, such as bacteria, viruses, pollen grains, and dust.

77 bioaerosols, such as house dust mite feces, pollen grains, and fungal spores.

78 es, a reduced number of petals, fewer viable pollen grains, and larger embryos and seeds compared to

79 observed in roots, ligules, leaves, sheaths, pollen grains, and surrounding the vascular tissues of a

80 ral styles and filaments, the germination of pollen grains, and the growth of pollen tubes.

81 eeding depression for the fraction of viable pollen grains, and to 26% of the inbreeding depression f

82 to be large enough to liberate anemophilous pollen grains, and unsteady boundary-layer forces produc

83 While soybean reproductive organs, pollen grains, and yield were reduced from dicamba and f

84 e to flowering, flower number, petal length, pollen grains/anther, pollen viability, and ovule number

85 ogenesis of the SEC8 mutants, and the mutant pollen grains appear to respond to the signals that init

86 Pollen grains are encased by a multilayered, multifuncti

87 sis of infrared microscopy spectra of single pollen grains are hampered by Mie-type scattering.

88 rium during development such that individual pollen grains are identical and perfectly reproducible.

89 oducts of microsporogenesis remain fused and pollen grains are released as tetrads.

90 stt1 pollen grains are smaller than wild type, have reduced g

91 Developing pollen grains are symplasmically isolated from the sporo

92 Pollen grains are the male gametophytes that deliver spe

93 r, in vivo assays indicate that these mutant pollen grains are unable to germinate a pollen tube.

94 ering plants, the haploid male gametophytes (pollen grains) are generated in the anther from reproduc

95 y Calberla solution and then classified main pollen grains as a causative agent of pollinosis.

96 elying on the first appearance of tricolpate pollen grains as a lower bound for the age of eudicots.

97 se to the F-actin cytoskeleton in developing pollen grains as it underwent striking structural reorga

98 Translatomes of pollen grains as well as in vivo- and in vitro-cultured

99 dosomes in both tapetal cells and developing pollen grains as well as morphological defects in early

100 ed, resulting in the formation of bicellular pollen grains at anthesis.

101 showing substructure of an anther and single pollen grains at the stigma and anthers.

102 n-localized enzyme HvYUCCA4, supporting that pollen grains autonomously produce auxin to stimulate a

103 self-incompatibility, under which individual pollen grains bear specificities determined by one or bo

104 When pollen grains become exposed to the environment, they ra

105 Pollen grains become increasingly independent of the mot

106 s of LATB caused similar depolymerization in pollen grains before germination and in pollen tubes.

107 nd phosphorus [P]) and transport billions of pollen grains between Britain and Europe, and locally pr

108 loral tissues was high in stigma, ovary, and pollen grains, but low in petals, sepals, the epidermis

109 he tryphine coat are delivered to developing pollen grains by the highly coordinated secretory activi

110 In this study we propose the concept that pollen grains can be engineered for use as a simple modu

111 In addition, gene expression by individual pollen grains can slow mutation accumulation and degener

112 orise pollen in environmental samples; here, pollen grains captured within c.

113 ly deposit the pollen coat at ET, which made pollen grains clump and prevented their normal dispersal

114 ae interpreted as specialized structures for pollen grain collection, functionally equivalent to the

115 The surface of a pollen grain consists of an outermost coat and an underl

116 Ultrastructural analyses revealed that these pollen grains contained aberrant endomembranes and lacke

117 the ovule contains the egg cell, whereas the pollen grain contains two sperm cells inside a supportin

118 A Manihot sp. pollen grain dated to 4600 calendar yr B.C. (5800 yr B.P

119 After that, all pollen grains deformed and collapsed.

120 igma to differentially modulate hydration of pollen grains, depending on whether the pollen is recogn

121 n microscopy to determine that double-mutant pollen grains develop plasma membrane irregularities fol

122 lar localisation of NET2A over the course of pollen grain development and investigated the role of th

123 Coordination of tapetum activity with pollen grain development depends on the action of subtil

124 Pollen grain development was severely affected in double

125 ss) mutations that define genes required for pollen grain development, pollen tube growth in the stig

126 During microspore maturation, adl1C-1 pollen grains display defects in the plasma membrane and

127 ence suppression of NaSIPP in Nicotiana spp. pollen grains disrupts the SI by preventing pollen tube

128 ally expressed in the vegetative cell of the pollen grain during pollen maturation which is essential

129 the AtPTEN1 gene is expressed exclusively in pollen grains during the late stage of development.

130 The evolutionary reduction of the number of pollen grains encompassing the male gametes is widesprea

131 ssor to an activator of translation when the pollen grain enters the progamic phase.

132 Pollen grains exhibit remarkable morphological diversity

133 Pollen grains express AtTIP1;3 and AtTIP5;1, two members

134 otocol to isolate single maize meiocytes and pollen grains for RNA-seq.

135 During reproduction in flowering plants, pollen grains form a tube that grows in a polarized fash

136 During angiosperm reproduction, pollen grains form a tube that navigates through female

137 e, providing phenotypic diversity even among pollen grains from a single plant.

138 nction, we analyze UAC abundances in ca. 800 pollen grains from an independently dated Permian-Triass

139 ed the beebread is predominantly composed by pollen grains from Baccharis species, which are endemic

140 Pollen grains from homozygous mutant lines displayed a s

141 the discovery of four well-dated tricolpate pollen grains from the Early Cretaceous midlatitudes.

142 Pollination is the transfer of pollen grains from the stamens to the stigma, an essenti

143 systems, including mite and insect cuticles, pollen grains, fungal spores, and insect eggs.

144 ntially regulated in developing microspores/ pollen grains (gametophyte) and tapetal cells (sporophyt

145 Moreover, this competition among pollen grains (gametophytes) depends, in part, on their

146 lantacyanin, and a small percentage of these pollen grains germinate in the closed anthers.

147 In flowering plants, pollen grains germinate on the pistil and send pollen tu

148 Double mutant pollen grains germinated and grew tubes down the transmi

149 Pollen development, pollen grain germination, and pollen tube elongation are

150 s essential for efficient pollen maturation, pollen grain germination, and pollen tube growth.

151 at the growing tip, starting at the time of pollen grain germination.

152 the pollen grain, which, in turn, influences pollen grain germination.

153 llen grains were much smaller than wild-type pollen grains, glued together, and totally collapsed.

154 The ornately geometric walls of pollen grains have inspired scientists for decades.

155 msl8 mutant pollen grains, however, continue to expand and eventuall

156 lopment of the intine layer, and collapse of pollen grains in glcat14a/b and glcat14a/b/c mutants.

157 As early as the bicellular stage, affected pollen grains in raring-to-go plants acquire or retain w

158 Cytological analysis of the pollen grains in these lines showed that about 50% were

159 oductive tract begins with the stigma, where pollen grains initially adhere, and extends through the

160 f the embryo sac by the two sperm cells of a pollen grain initiates seed development.

161 g of the exit of the male germ unit from the pollen grain into the tube.

162 The conversion of allergic pollen grains into carbon microstructures was carried ou

163 Germination of pollen grains is a crucial step in plant reproduction.

164 t is believed that rejection of incompatible pollen grains is effected by recognition events between

165 The surface of pollen grains is reinforced by pollen wall components pr

166 t with the observations that the diameter of pollen grains is similar to the spacing between hairs on

167 The exine of angiosperm pollen grains is usually covered by a complex mix of met

168 The haploid male gametophyte, the pollen grain, is a terminally differentiated structure w

169 ompared to wild-type pollen, although mutant pollen grains lacked an obvious cellular defect.

170 ::GUS expression is confined to stipules and pollen grains leading to fucosylation of the walls of th

171 enged on 2 consecutive days with either 4000 pollen grains/m(3) of Dactylis glomerata pollen or clean

172 An Arabidopsis pollen grain (male gametophyte) consists of three cells:

173 The haploid pollen grain (male gametophyte) extends a pollen tube th

174 , and also play a gametophytic role later in pollen grain maturation.

175 In contrast, in developing microspores/pollen grains, maximal expression of the lipid marker ge

176 dded within the large vegetative cell of the pollen grain, mRNAs from sperm are poorly represented in

177 confined to the cytoplasm of the trinucleate pollen grains: no signal was detected in the tapetum.

178 ation, gasification and ionization; a single pollen grain of 25 mum diameter can give a plume of comb

179 Upon release from the anther, pollen grains of angiosperm flowers are exposed to a dry

180 Pollen grains of Arabidopsis (Arabidopsis thaliana) cont

181 Pollen grains of Arabidopsis (Arabidopsis thaliana) cont

182 Mature pollen grains of Brassica napus are shown to contain thr

183 Pollen grains of land plants have evolved remarkably str

184 Pollen grains of Lilium longiflorum are a long-establish

185 Incense honey should contain over 30 % of pollen grains of Pittosporum undulatum Vent.

186 ds of A. thaliana, principally in developing pollen grains of stage 9-11 anthers.

187 The vast majority of the pollen grains of these mutants were identical to wild ty

188 (designated LePro 1) encoding profilin from pollen grains of tomato (Lycopersicon esculentum Mill. c

189 It has long been known that more pollen grains often arrive on stigmas than there are ovu

190 be growth, beginning with the landing of the pollen grain on the stigma and ending with double fertil

191 It was their role as pollinators, carrying pollen grains on their flights, that helped unlock the s

192 enerated in vitro were exposed to O europaea pollen grains or lipids isolated from them.

193 channels have never been reported in either pollen grains or pollen tubes.

194 ube is a cellular protuberance formed by the pollen grain, or male gametophyte, in flowering plants.

195 As a major component of pollen grains, p-coumaric acid is ubiquitous in the natu

196 Exposure to the same rates reduced pollen grains per anther by 25% and 18%, respectively, c

197 ubic meter (r(2) = 0.80, P < .001) than with pollen grains per cubic meter (r(2) = 0.61, P < .001).

198 The fluorescence of up to 80,000 pollen grains per individual plant can be measured in 10

199 ll compared to tree-pollen, averaging 73~650 pollen grains per year.

200 nd complemented these with proteomic data of pollen grains (PGs) and PTs.

201 We have recently developed pollen grains (PGs) as a unique method to deliver vaccin

202 In the pollen grain, Pol IV is also required for the accumulati

203 ive promoters, localized in the cytoplasm of pollen grains, pollen tubes, and also root trichoblast c

204 on correlated with the occurrence of smaller pollen grains, poor pollen germination, and shorter poll

205 To survive this process, pollen grains possess a variety of physiological and str

206 e report the discovery of a number of fossil pollen grains preserved in dinosaur-bearing deposits fro

207 Pollen grains protect the sperm cells inside them with t

208 h-clamp whole-cell configuration analysis of pollen grain protoplasts revealed three subpopulations o

209 ovule oversupply increases the proportion of pollen grains received that are used to fertilize ovules

210 Ragweed pollen grains release subpollen particles (SPP) of respi

211 Production of functional pollen grains relies significantly on deterioration and

212 netic background, male meiotic products--the pollen grains--remain physically attached thereby facili

213 Pollen grains remained intact, yet still increased yeast

214 s with long styles, short anthers, and small pollen grains, S-morph individuals have flowers with sho

215 Transcriptomic analysis reveals that pollen grains share features with endosperm, and express

216 xperimental observations show that different pollen grains sharing the same number and type of apertu

217 Moreover, numerous pollen grains showed two tips emerging instead of one in

218 constitutively active NtRac1 in transformed pollen grains significantly increases the ratio of phosp

219 identified a mutant, raring-to-go, in which pollen grains stained for callose before anther dehiscen

220 Pollen grains stock up on starch to power germination an

221 this tissue in the quality and production of pollen grains, studies on promoter gene regulation of ta

222 play swollen, hypertrophic tapetal cells and pollen grains, suggesting disrupted cell wall integrity.

223 biophysical patterning mechanism that forms pollen grain surfaces.

224 Time-lapse imaging revealed that wild-type pollen grains swell, and then they stabilize in volume r

225 henylpropanoids (e.g. flavonols) produced by pollen grain tapetal cells are deposited in the pollen w

226 From micrometer-sized pollen grains that can easily stick to hairy insects for

227 Stamens produce pollen grains that contain male gametes, while the carpe

228 ibility in Brassica entails the rejection of pollen grains that express specificities held in common

229 This floral sonication ejects pollen grains that the bees collect as larval food.

230 The outer layer of the pollen grain, the exine, plays a key role in the surviva

231 cells of flowering plants are carried in the pollen grain to the female pistil.

232 f pollination in Arabidopsis: the binding of pollen grains to female stigma cells.

233 plant reproduction depends on the ability of pollen grains to generate a pollen tube, which elongates

234 ut the contribution of other constituents in pollen grains to this process is unknown.

235 d the accumulation of flavonol glycosides in pollen grains to wild-type levels, corroborating the req

236 folded structures from intestinal villi and pollen grains to wrinkled membranes and programmable met

237 dopsis T-DNA mutant in which anthers release pollen grains too late for pollination to occur.

238 principles explain how wall structure guides pollen grains toward distinct folding pathways.

239 Pollen grains undergo dramatic changes in cellular water

240 ty acids, and triacylglycerols isolated from pollen grains upregulate CD1d.

241 qualitative pollen analysis by counting 500 pollen grains using harmonised methods of melissopalynol

242 at the droplet interface, analogously to the pollen grain wall formation.

243 tative nucleus is positioned adjacent to the pollen grain wall, separate from the two sperm cells, wh

244 mutants, the intact MGU is displaced to the pollen grain wall.

245 Many pollen grains were collapsed and inviable in the gsl1-1/

246 Mature pollen grains were collected from ragweed plants grown a

247 The resulting pollen grains were either shrunken or contained two nucl

248 Mature pollen grains were much smaller than wild-type pollen gr

249 odel plant Arabidopsis thaliana Mutant med30 pollen grains were viable and some were able to germinat

250 of the intine wall during maturation of the pollen grain, which, in turn, influences pollen grain ge

251 unreduced 'big' (2n=4x) and 'jumbo' (4n=8x) pollen grains, which were clearly distinguished by size.

252 function appears to nurture and decorate the pollen grains with critical surface molecules.

253 minal portion of the protein and tags mutant pollen grains with the beta-glucuronidase reporter.

254 od reveals that LePro 1 is expressed only in pollen grains, with undetectable transcription in other

255 CCRC-M1 does label pollen grains within anthers and pollen tube walls.

256 Sperm in pollen grains within anthers continue to synthesize DNA,

257 ances thousands of times the diameter of the pollen grain without cell division, thus representing an

258 rgy syndrome due to increasing allergic tree pollen grains would be appeared.