缺陷
发表于 2025-3-26 23:00:10
EC Research Programmes in the Reproductive Biology of Higher Plantsas followed by BAP (Biotechnology Action Programme) from 1985 to 1989. Examples of outstanding results in plant biology which resulted from BEP and BAP include the characterisation and isolation of numerous microbial and plant genes important for industry andagriculture, the development of new trans
伪证
发表于 2025-3-27 05:08:31
Plant Reproduction: Past, Present and Futuree properties of the plants that developed from the seed produced. The first reports in the literature of sex cell function in plants are, however, relatively recent (for review, see Sachs, 1890). Amici (1846, quoted in Sachs, 1890) observed germinating pollen tubes and guessed correctly at their fun
DAUNT
发表于 2025-3-27 08:32:17
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小臼
发表于 2025-3-27 10:32:58
Homeotic Genes Directing Flower Development in ,ansposon mutagenesis. The first includes . (.), which is required to switch inflorescence meristems to floral. This gene has been isolated and shown to be expressed transiently in bract, sepal, petal and carpel primordia. The second group of genes controls the identity (and sometimes the number) of
污秽
发表于 2025-3-27 16:04:42
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致命
发表于 2025-3-27 21:44:36
Gametophytic Gene Expression anther of a flower bud. Dramatic advances have been made recently in our understanding of gene expression in the different tissues of the anther including the tapetum (Koltunow et al, 1990: Mariani et al, 1990). Following meiosis there is a long interphase period during which the microspores enlarg
somnambulism
发表于 2025-3-27 23:00:43
Gametophytic Competition and Plant Breedingewed by Ottaviano and Mulcahy, 1989; see also Quesada, et al., 1991). The response has, however, not been found in some tested wild species (Snow, 1990), and, although it has been reported to persist into a subsequent generation in one study (Mulcahy, et al., 1978), this was not the case in a second
Mets552
发表于 2025-3-28 03:52:34
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排名真古怪
发表于 2025-3-28 09:59:22
Genetic Engineering for Fertility Controlion of chimaeric ribonuclease genes to immature anthers of transgenic plants. Ribonuclease expression destroyed the tapetal cell layer, prevented pollen formation and lead to male sterility. Male sterility was restored in progeny of crosses between male sterile plants and plants expressing a chimaer
蒙太奇
发表于 2025-3-28 11:02:35
Male Sterilities and F1 Hybrids in ,ts for significant heterosis for some agronomic characters such as plant height, leaf area and yield in . (Lefort-Buson et al., 1987) and the possibility of homogeneous production (mechanical harvesting) in . have stimulated interest in the development of hybrid cultivars. But to exploit the advanta