ライフサイエンスコーパス: embryo sac

1 from pollen with two sex cells in the female embryo sac.

2 he successful delivery of sperm cells to the embryo sac.

3 lting in a split gynoecium and no observable embryo sac.

4 y do not rupture but continue to grow in the embryo sac.

5 n gene BEL1-like homeodomain 1 (BLH1) in the embryo sac.

6 e arriving pollen tubes communicate with the embryo sac.

7 ts establishment of cell fates in the mature embryo sac.

8 nt and cell specification in the Arabidopsis embryo sac.

9 ey are transported in the pollen tube to the embryo sac.

10 two sperm cells within its cytoplasm to the embryo sac.

11 ough female tissues to deliver sperms to the embryo sac.

12 n most nucellar cells surrounding the entire embryo sac.

13 tapetal (endothelium) layer surrounding the embryo sac.

14 xpression to the endothelium surrounding the embryo sac.

15 ental stages, but there was no expression in embryo sacs.

16 gene expression cannot be detected in ig1-O embryo sacs.

17 perm cells to the female gametophyte (FG) or embryo sac [6] during a long assisted journey through th

18 ee nuclear divisions leading to a variety of embryo sac abnormalities, including extra egg cells, ext

19 As eostre-1 embryo sacs also show nuclear migration abnormalities, t

20 ropylar nuclei at the stage of four-nucleate embryo sac and delay in the progression of embryo develo

21 len tube guidance to the female gametophyte (embryo sac) and its rupture to release sperm cells.

22 nutritional supply to the growing ovule and embryo sac, and in pollen tube guidance.

23 f an inner integument for development of the embryo sac, and the existence of additional genes regula

24 Here I report on a novel type of embryo sac (angiosperm female gametophyte or haploid egg

25 en species (ROS) accumulation in anthers and embryo sacs, as evidenced by nitroblue tetrazolium stain

26 in a cluster of nucellar cells close to the embryo sac at the chalazal end, but after pollination it

27 e we show that GEX1 is also expressed in the embryo sac before cellularization, in the egg cell after

28 Nor are they detectable within cells of the embryo sac before fertilization, including the egg cell.

29 Conversely, fie2 is expressed in the embryo sac before pollination.

30 the developing embryo sac, resulting in the embryo sacs being physically restricted and female repro

31 evelopment to mutants with apparently normal embryo sacs, but exhibiting defects in processes such as

32 mechanistically established in the syncytial embryo sac by spatially restricted CKI1 expression, foll

33 Double fertilization of the embryo sac by the two sperm cells of a pollen grain init

34 Seeds derived from female gametocytes (embryo sacs) carrying a mutant mea allele abort and exhi

35 to double fertilization, sperm nuclei within embryo sacs contain the 2C quantity of DNA.

36 ells with undivided nuclei, early aposporous embryo sacs containing two to four nuclei, and random gr

37 Furthermore, lorelei embryo sacs continue to attract additional pollen tubes

38 ed by apomeiosis, the formation of unreduced embryo sacs derived from nucellar cells of the ovary and

39 endosperms produced by fertilization of stt1 embryo sacs develop and grow more slowly than wild type.

40 sis plastid-localized PGDH genes (3-PGDH and EMBRYO SAC DEVELOPMENT ARREST9 [EDA9]) with a high perce

41 Angiosperm embryo sac development begins with a phase of free nucle

42 recombination with the trait for aposporous embryo sac development in Pennisetum squamulatum and Cen

43 FB) cycles can also be observed during early embryo sac development of chromosome 4S(L) addition line

44 ng from defects in different stages of early embryo sac development to mutants with apparently normal

45 arkers strictly cosegregated with aposporous embryo sac development, clearly defining a contiguous ap

46 and transcriptional regulation required for embryo sac development, fertilization and early embryoge

47 failure in the fusion of the polar cells in embryo sac development, in addition to embryo and endosp

48 tissues to affect ovule structure and impede embryo sac development, thereby disrupting pollen tube g

49 abnormal leaf morphology as well as abnormal embryo sac development.

50 recombination with the trait for aposporous embryo sac development.

51 tso1-3 ovules usually lacked embryo sacs due to a failure to form megaspore mother ce

52 e superficial similarity of ig1-O leaves and embryo sacs, ectopic knox gene expression cannot be dete

53 In flowering plants, the embryo sac embedded within the ovule contains the egg ce

54 nucellar cells degenerating in concert with embryo sac expansion.

55 y morphological abnormalities and 95% of the embryo sacs fail to develop properly, which results in r

56 ng plants, the egg develops within a haploid embryo sac (female gametophyte) that is encased within t

57 imary function is to bear and to nurture the embryo sac/female gametophyte and pollen, in which the e

58 oduction, namely in pollen tube guidance and embryo sac fertilization, pathogen defense, and response

59 The egg of the aposporous embryo sac follows parthenogenetic development into an e

60 erent female tissues to deliver sperm to the embryo sac for fertilization.

61 cells, consistent with subsequent aposporous embryo sac formation without meiosis.

62 normalities in megaspore differentiation and embryo sac formation.

63 Pollen tubes reaching lorelei embryo sacs frequently do not rupture but continue to gr

64 in the ovules of Trimenia, through which the embryo sacs grow, contains starch and other carbohydrate

65 stt1 embryo sacs have smaller central cells and abnormal anti

66 nscript of these two genes to the developing embryo sacs in the apomictic ovaries.

67 Female gametophytes (embryo sacs) in higher plants are embedded in specialize

68 e data suggest that the morphology of mutant embryo sacs influences endosperm development, leading to

69 In angiosperms, double fertilization of the embryo sac initiates the development of the embryo and t

70 growth, polarity or guidance, or pollen tube-embryo sac interactions or fertilization.

71 Because the embryo sac is embedded within the maternal ovule tissue,

72 ore survives in the tetrad and more than one embryo sac is formed in each ovule.

73 cts of the aposporous type, each cell of the embryo sac is genetically identical to somatic cells of

74 bryo and endosperm development in aposporous embryo sacs is fertilization independent.

75 ), and repulsion of multiple pollen tubes in embryo sac (IV2).

76 the mitotic divisions or failed to complete embryo sac maturation.

77 DI), have reduced seed set, due to delays in embryo sac maturation.

78 Here, we show that in glc mutant embryo sacs one sperm cell successfully fuses with the e

79 of transmission through the megagametophyte (embryo sac or egg).

80 The female gametophyte (embryo sac or megagametophyte) plays a critical role in

81 intaining ROS localization and important for embryo sac patterning.

82 rging AI cell is already transitioning to an embryo sac program prior to mitotic division.

83 teguments fail to accommodate the developing embryo sac, resulting in the embryo sacs being physicall

84 but precedes fertilization, suggesting that embryo sacs sense the imminent arrival of pollen tubes a

85 Wild-type mature embryo sacs show ROS exclusively in the central cell, wh

86 ucuronidase fusions, and all of these showed embryo sac-specific expression in the ovule.

87 This is the first new pattern of embryo sac structure to be discovered among angiosperms

88 and undergoes mitosis, forming an aposporous embryo sac that displaces sexual structures.

89 l as a short-range attractant emitted by the embryo sac that guides the final stage of tube growth.

90 also observed in the endosperm of mutant prl embryo sacs that arrest following fertilization.

91 and fertilization occurred; in most of these embryo sacs the endosperm started to divide but an embry

92 t sporocyteless that produces ovules without embryo sacs, together with the ATH1 Arabidopsis whole-ge

93 ic expression profiling, suggesting that the embryo sac transcriptome may contain a significant fract

94 ome was most similar to the early aposporous embryo sac transcriptome when comparing known functional

95 were obtained and GUS staining of ovules and embryo sacs was observed only if the Agrobacterium were

96 development, including nonviable pollen and embryo sacs with unfused polar nuclei.