ライフサイエンスコーパス: microspore

1 ent as stored mRNA and stored protein in the microspore.

2 type-specific pectin degradation to separate microspores.

3 ce of storage oil bodies inside the maturing microspores.

4 te with the cell wall of aberrant developing microspores.

5 , with corresponding loss of fluorescence on microspores.

6 onads that contain binuclear and polynuclear microspores.

7 ll be transferred to the surface of adjacent microspores.

8 ical system of mesopores interconnected with microspores.

9 resulting in the formation of multinucleate microspores.

10 lted in polyads containing from one to eight microspores.

11 mutants is attributed to the degeneration of microspores.

12 len, but were already present in unicellular microspores.

13 the highest levels in developing ovules and microspores.

14 the tetrad microspores had become individual microspores.

15 e tapetal cell layer, which accounts for the microspore abortion and male sterility.

16 The ABORTED MICROSPORES (AMS) transcription factor is a master regul

17 er, it does not appear to be anchored to the microspore and forms large aggregates on the developing

18 ment, we identified genes involved in pollen microspore and tapetum development that were specificall

19 and forms large aggregates on the developing microspore and the locule walls.

20 Some genes are highly expressed in microspores and bicellular pollen (COPT3, STP2, OPT9), w

21 uorescent protein accumulated in unicellular microspores and bicellular pollen but decreased in trice

22 porter gene and selectable marker into these microspores and hence, after in vitro maturation and in

23 he highest expression in meiocytes, tetrads, microspores and mature pollen.

24 isms by which sporopollenin is anchored onto microspores and polymerized in specific patterns are unk

25 methylation is lost from retrotransposons in microspores and sperm cells and restored by de novo DNA

26 t in the surface fractions of the developing microspores and the mature pollen, although fragmented o

27 e cell, and their precursor, the postmeiotic microspore, and found that unlike in mammals the plant g

28 primary cell wall of meiocytes, tetrads and microspores, and the expression of this gene is essentia

29 In general, pollen meiocytes and microspores are characterized by increased susceptibilit

30 Microspores at late uninucleate/early binucleate stages

31 nt cell wall matrix formed on the surface of microspores at the late tetrad stage, is hypothesized to

32 tum of 3-5 mm B. napus buds, which contained microspores at the late-vacuolate and bicellular stages

33 Enzymatic removal of callose from wild-type microspores at the tetrad stage did not release the micr

34 properties of the primexine component of the microspore cell wall.

35 Dry microspores contain large quantities of stored protein a

36 Furthermore, wild-type microspores contained primexine-localized epitopes indic

37 chemical and genetic tools on Brassica napus microspore-derived embryos and Arabidopsis thaliana zygo

38 icate that RGP1 and RGP2 are required during microspore development and pollen mitosis, either affect

39 Microspore development in eda9.1eda9.1 Pro-35S:EDA9 was

40 Microspore development in psp1.1/psp1.1 Pro35S:PSP1 arre

41 of PSP1 in the tapetum at critical stages of microspore development suggests that PSP1 activity in th

42 tant role in partitioning of amino acids for microspore development.

43 degrading the pollen mother cell wall during microspore development.

44 egeneration of the tapetal cell layer during microspore development.

45 ted in the late uninucleate stage of tobacco microspore development.

46 Consequently, defective microspores did not form a continuous cell plate, and tw

47 We find that ABORTED MICROSPORES directly regulates the expression of TEK and

48 lly undergo nondisjunction during the second microspore division (generative cell division).

49 me nondisjunction can occur during the first microspore division.

50 Separation of microspores does not occur in tetraspore (tes) mutants o

51 c wall around the pollen mother cell and the microspores during the tetrad stage.

52 cell at the onset of meiosis and around the microspores during the tetrad stage.

53 occurs in the microsporocyte to produce four microspores, each of which develops into a pollen grain.

54 he products of male meiosis into a tetrad of microspores, each of which develops into a pollen grain.

55 genesis in dandelion (Taraxacum officinale), microspore embryogenesis in oilseed rape (Brassica napus

56 e investigated this using the Brassica napus microspore embryogenesis system, where the male gametoph

57 Microspore embryos are formed via two pathways: a zygoti

58 nd endosperm) and in apomictic, somatic, and microspore embryos.

59 In the ask1-1 mutant, abnormal microspores exhibit a range of sizes.

60 In approximately half of the dividing microspores exhibiting aberrant MT organization, spindle

61 sors are secreted from the tapetum to become microspore exine constituents; this pathway explains the

62 psis thaliana produce tetrad pollen in which microspores fail to separate during pollen development.

63 the stress during the stages of meiosis and microspore formation but had no effect on more advanced

64 terizing gene expression specifically during microspore formation.

65 Here we develop a method to isolate the four microspores from a single tetrad in maize for the purpos

66 nd vegetative cells, as well as in wild-type microspores from which both pollen cell types originate,

67 n the tapetum of the anther after the tetrad microspores had become individual microspores.

68 r the specific expression of the gene in the microspores in the florets.

69 ly of exine components from tapetal cells to microspores in the intact anthers of Arabidopsis thalian

70 se removal is not sufficient to disperse the microspores in wild-type.

71 pid process that is activated by placing dry microspores into water.

72 pid process that is activated by placing dry microspores into water.

73 use the amount of callose deposition between microspores is correlated with tetrad pollen formation i

74 nt embryos can develop from somatic cells or microspores, maternal contributions are not considered t

75 During microspore maturation, adl1C-1 pollen grains display def

76 h interruption of tapetum development before microspore meiosis.

77 cell and is produced prior to any asymmetric microspore mitosis.

78 meiotic cytokinesis in tes mutants, all four microspore nuclei remain within the same cytoplasm, with

79 When the microspore nucleus contains only one B chromosome, two k

80 usion of nuclei in binuclear and polynuclear microspores occurs spontaneously before pollen mitosis I

81 of the GUS reporter gene in the tapetum and microspores of Arabidopsis anthers identical to the AtMY

82 In dividing microspores of the double mutant, microtubules often bec

83 ation of the callose wall that separates the microspores of the tetrad, and also play a gametophytic

84 s defective, producing an abnormal number of microspores of variable sizes.

85 Apparently, the gametophytic microspore oil-body oleosins share common epitopes at th

86 No expression was detected in microspores or pollen.

87 discussed in relation to proposed models of microspore polarity and cell fate determination.

88 this gene was only expressed in embryogenic microspores, pollen embryoids, and developing zygotic em

89 t are differentially regulated in developing microspores/ pollen grains (gametophyte) and tapetal cel

90 In contrast, in developing microspores/pollen grains, maximal expression of the lip

91 ion in cell division was analyzed in haploid microspores produced by the heterozygote.

92 Degeneration of pollen occurs soon after microspore release from the tetrads, at which time the t

93 ts, pollen development is aborted soon after microspore release, regardless of environmental conditio

94 th expression in the tapetum at the stage of microspore release.

95 all were no longer detectable at the time of microspore release.

96 pressed in the tapetum during the phase when microspores separate from their meiotic siblings.

97 TET loci in Arabidopsis result in failure of microspore separation during pollen development due to a

98 Mutations in a new locus required for microspore separation, QRT3, were isolated, and the corr

99 Imaging of developing irx9l microspores showed that the earliest detectable defect w

100 secreted from tapetal cells during the early microspore stage.

101 lls for synthesis of compounds important for microspore structure and in transfer of organic nitrogen

102 er cell layers surrounding the meiocytes and microspores, suggesting that appropriate GA signaling in

103 ores at the tetrad stage did not release the microspores, suggesting that callose removal is not suff

104 It then moved to the microspore surface and remained as a component of exine.

105 hich plays a role in exine patterning on the microspore surface.

106 nases that hydrolyze the callose wall of the microspore tetrad.

107 plast microtubules during cytokinesis in the microspore that is essential for cell plate formation.

108 arrested during transition from uni-nucleate microspore to bicellular pollen.

109 the EcMt gene transcript and the ability of microspores to form embryoids.

110 tisense RNA approach that it is required for microspores to progress from the unicellular to bicellul

111 on in all transgenic plants regenerated from microspores transfected with the full transferred DNA/pr

112 Haploid microspores undergo polar nuclear migration and asymmetr

113 oropollenin adhesion and patterning early in microspore wall development.

114 aging of GFP-tagged microtubules in dividing microspores we show that TIO is required for expansion o

115 rescent components of developing tapetum and microspores were imaged in intact, live anthers using tw

116 Microspores were released into the anther locule at the

117 dified form, then relocate to the developing microspores where they eventually constitute some of the

118 Compared with the control microspores, which formed bipolar spindles at the cell p

119 expressed in both maturing seeds and floral microspores, which will become pollen.

120 combination protein A delivered to triticale microspores with the help of a Tat2 cell-penetrating pep

121 ad previously been shown to produce abnormal microspores with variable DNA content, was also cytologi