共查询到20条相似文献,搜索用时 31 毫秒
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Developmental control of Arabidopsis seed oil biosynthesis 总被引:2,自引:0,他引:2
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Expression of the maize GALACTINOL SYNTHASE gene family: (I) Expression of two different genes during seed development and germination 总被引:1,自引:0,他引:1
Tian-Yong Zhao Richard Thacker J. Willis Corum III John C. Snyder Robert B. Meeley Ralph L. Obendorf Bruce Downie 《Physiologia plantarum》2004,121(4):634-646
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Jiang S Kumar S Eu YJ Jami SK Stasolla C Hill RD 《Journal of experimental botany》2012,63(7):2693-2703
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Gibberellins and Light-Stimulated Seed Germination 总被引:3,自引:0,他引:3
Bioactive gibberellins (GAs) promote seed germination in a number of plant species. In dicots, such as tomato and Arabidopsis, de novo GA biosynthesis after seed imbibition is essential for germination. Light is a crucial environmental cue determining seed germination in some species. The red (R) and far-red light photoreceptor phytochrome regulates GA biosynthesis in germinating lettuce and Arabidopsis seeds. This effect of light is, at least in part, targeted to mRNA abundance of GA 3-oxidase, which catalyzes the final biosynthetic step to produce bioactive GAs. The R-inducible GA 3-oxidase genes are predominantly expressed in the hypocotyl of Arabidopsis embryos. This predicted location of GA biosynthesis appears to correlate with the photosensitive site determined by using R micro-beam in lettuce seeds. The GA-deficient non-germinating mutants have been useful for studying how GA stimulates seed germination. In tomato, GA promotes the growth potential of the embryo and weakens the structures surrounding the embryo. Endo-b-mannanase, which is produced specifically in the micropylar endosperm in a GA-dependent manner, may be responsible for breaking down the endosperm cell walls to assist germination. Recently, a role for GA in overcoming the resistance imposed by the seed coat was also suggested in Arabidopsis from work with a range of seed coat mutants. Towards understanding the GA signaling pathway, GA response mutants have been isolated and characterized, some of which are affected in GA-stimulated seed germination. 相似文献
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The role of the cell cycle machinery in resumption of postembryonic development 总被引:1,自引:0,他引:1
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Barrôco RM Van Poucke K Bergervoet JH De Veylder L Groot SP Inzé D Engler G 《Plant physiology》2005,137(1):127-140
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