Ramin Yadegari, Robert B. Goldberg (auth.), Brian A.'s Cellular and Molecular Biology of Plant Seed Development PDF

By Ramin Yadegari, Robert B. Goldberg (auth.), Brian A. Larkins, Indra K. Vasil (eds.)

ISBN-10: 9048148782

ISBN-13: 9789048148783

ISBN-10: 9401589097

ISBN-13: 9789401589093

The beginnings of human civili zation could be traced again to the time , ne- ly 12 ,000 years in the past , while th e early people progressively ch anged from a lifetime of searching and amassing meals , to generating nutrients. This starting of pri- tive agriculture ensured a responsible offer of meals , and fostered the residing jointly of individuals in teams and the improvement of s o c i e ty. in the course of th is time, plant s e e ds have been well-known a s a worthy s o ur c e of meals and food , and commenced for use for transforming into crops for nutrition. Ever s i n c e , plant seeds have performed an incredible position within the improvement of the human civilization . Even this present day, s e e ds of some crop s p e c i e s , s uc h because the cereals and legume s, are the first s o u r c e of such a lot human nutrients , and the most important commodity in overseas agriculture. because of their nice value as meals for human s and in foreign exchange , seeds were a favourite item of s t u d y by means of developmental biologists and physiologi sts , nutritionist s and chem i sts . A wealth of valuable info i s to be had on th e biology of seed s .

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B. ] (Figure 2). The region of Kti3 differential expression overlaps the presumptive embryonic root initials of the tobacco embryo (Soueges, 1920). , 1996) (Figure 2). , 1986)], is transcribed in a doughnut-shaped cluster of cell s located medially (along the equator) within a tobacco globular-stage embryo (R. B. ) (Figure 2). Lei-transcribing cells overlap the ground meristem and an adjacent equatorial band of the protoderm (R. B. ). , 1996) (Figure 2). , 1996). , 1996). , 1996) (Figure 2). The activity of these four genes, regardless of whether they playa role in regulating the ultimate differentiation of the embryonic regions in which 30 Ramin Yadegari and Robert B .

A. W. (1993) Ge netic and molec ular characteri zation of embryo nic mutants identified following seed tran sformation in Arabidopsis. Mol. Gen . Genet. 241, 504-5 14. Chas an, R. (1994) Arab inogalactan proteins : getting to the core . Plant Ce ll 6, 1519-1 521. E (199 1) Isolation and charac terizat ion of 51 embryo-specific mutations of maize. Plant Cell 3, 935-951 . , and Krebbers, E. (1994) A cotyledon regulatory region is responsible for the different spatial expre ssion patterns of Arabidopsis 2S albumin genes .

However, the existing data indicate that unique transcription factors must be Embryogenesis in dicotyledonous plants 33 active within each embryonic region, and that these factors interact with specific promoter elements. The combination of these elements and factors gives rise to the transcriptional pattern of the whole embryo (Figure 3). Identification of transcription factors that interact with region-specific DNA elements should provide entry into the independent regulatory networks required for specifying each particular region of a plant embryo.

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Cellular and Molecular Biology of Plant Seed Development by Ramin Yadegari, Robert B. Goldberg (auth.), Brian A. Larkins, Indra K. Vasil (eds.)

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