By Ramin Yadegari, Robert B. Goldberg (auth.), Brian A. Larkins, Indra K. Vasil (eds.)
The beginnings of human civili zation might 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 accumulating foodstuff , to generating foodstuff. This starting of pri- tive agriculture ensured a liable offer of meals , and fostered the dwelling 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 nutrition and foodstuff , and commenced for use for growing to be crops for meals. Ever s i n c e , plant seeds have performed a huge 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 so much human meals , and the most important commodity in overseas agriculture. due to their nice value as foodstuff 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 beneficial info i s to be had on th e biology of seed s .
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Extra info for Cellular and Molecular Biology of Plant Seed Development
Ontogeny of the epidermis. Bot. Gaz . 146, 188-195. B. ( 1985b) Cell determination during embryogenesis in Citrus jambhiri. II. Epidermal differentiation as a one-time event. Ame r. 1. Botany 72, 1602-1609. , and Jurgens, G . (1996) Molec ular analysis of the Arabidopsis pattern formation gene GNOM: gene structure and intragenic complementation. Mol. Gen. Genet. 250, 68 1-691. M. , and Hall, T'C . (1991) Positive and negative cis-acting DNA domains are required for spatial and temporal regulation of gene expression by a seed storage protein promoter.
Auxins The morphological events which cause the embryo proper to initiate cotyledons and become bilaterally symmetric during the globular-heart transition phase of embryogenesis (Figure I) may involve the activity of signaling molecules. , 1993). The auxin, indole3-acetic acid (lAA), is involved in a number of plant activities, including photo- and gravitropism, apical dominance, and vascular cell differentiation (Taiz and Zeiger, 1991). , 1992, and references therein). Microscale transport assays have indicated a polar, basipetal direction for auxin transport along the embryo axis (Greenwood and Goldsmith, 1970; Fry and Wangermann, 1976).
BioI. 45, 25-45. - W. (1994) Regulatory hierarchy of photomorphogenic loci: allelespecific and light-dependent interaction between the HY5 and COP I loci. Plant Cell 6, 613-628. , and Colombo, L. (1996) Molecular control of ovule development. Trends Plant. Sci. I, 228-232. , and Small, S. (1996) The eve stripe 2 enhancer employs multiple modes of transcription al synergy. Development 122, 205-214. , and MUeller, AJ . (1994) The FUS3 gene of Arabidopsis thaliana is a regulator of gene expression during late embryogenesis.