Seed, development structure

Fruits may also be classified into a number of structural types. The individual seed-bearing structures of the flower called carpels constitute the gynoecium. The seed-containing cavity of a carpel is called the ovary, and its wall develops into the pericarp of the fruit. The edible fleshy part of a fruit most commonly develops from the ovary wall, but it may be also derived from the enlarged tip of stem from which floral organs arise, and sometimes leaf-like structures protecting the flowers may also become fleshy, e.g., in pineapple. 

Studies with ABA mutants have not yet contributed substantially to the expansion of our knowledge concerning the molecular action of ABA. Studies with tomato mutants indicate an important role for ABA in regulating membrane and cell wall structure [see 18 for review]. During seed development applied ABA stimulates protein synthesis both by maintaining levels of mRNA stability and promoting RNA synthesis [19]. The aba abi3 recombinant may allow these experiments to be shifted to an in vivo situation. 

Jaarsma, J. and de Bruin, B. (1990) Fatty add composition at position sn-2 of seed oil triacylglycerols in high and low emdc add varieties of Brassica napus L. at different stages of seed development, in Plant Lipid Biochemistry, Structure and Utilization, eds. P.J. Quinn and J.L. Harwood, Portland, London, pp. 33-35. 

Plant synthates, primarily intended for the developing seed, are the main nutrition source to the fungus (Mower and Hancock, 1975) which obviously is exploited at about 5 dpi depending on the ergot species. To use this natural sink, several enzymes are secreted such as the cell-wall bound inducible fructosyltransferase (invertase) (Bassett et ah, 1972 Taber, 1985 Tudzynski et ai, 1995) and the fungal foot is developed structurally for attaching and absorbing (Luttrell, 1980). While intense exudation of honeydew is reported to occur without penetration... 

S. S. Singh, T. Nee and M. R. Pollard, Neutral lipid biosynthesis in developing Cuphea seeds, in "Structure, function and metabolism of plant lipids," P. A. Siegenthaler and W. Eichenberger, eds., Elsevier Science Publishers, Amsterdcun (198 f). 

On the other hand, multimodality of biological activities of melatonin is well known. Therefore various derivatives are needed for carrying out its structure-activity relationship study. 1-Hydoxymelatonin (19) would be a suitable seed for developing yet unknown results. 

Schiraldi et al. [64] have developed this kind of material by combining silica particles and pHEMA. pHEMA is a biocompatible hydrogel that has been widely studied in the past decades due to its chemical-physical structure and mechanical properties. It has been widely used in ophthalmic prostheses (contact or intraocular lenses), vascular prostheses, drug delivery systems and soft-tissue replacement [65]. These authors have shown that by incorporating silica nanoparticles, the resulting hybrid material is highly biocompatible and promotes bone cell adhesion and proliferation of bone cells seeded on it.1 ... 

The seeds of dicotyledonous plants have two cotyledons, or seed leaves, which are part of the embryo. The cotyledons usually are the main storage tissue, although in some plants (such as castor bean) the endosperm also has a storage function. During development in the field, seeds gradually accumulate storage oils, proteins and carbohydrates (Table 3.1). In the seed, the cotyledon structure is relatively simple. The remainder of the embryo, the embryonic axis, consists mostly of undifferentiated cells, but provascular tissue can be detected that develops into vascular tissue in the seedling. 

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