哭得清醒了
发表于 2025-3-30 09:09:19
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Missile
发表于 2025-3-30 15:50:32
,, and , Aspects of Embryo — Ovule Interactions in Intra- and Interspecific Beet Crosses, ploidy level) have successfully been made in . (Jassem 1973), and triploids are typically used in commercial seed production. In addition, a succesful system for the production of gynogenic haploids in sugar beet (.) through . culture has been developed (Hosemans & Bossoutrot 1983, D’Halluin & Keimer 1986).
执
发表于 2025-3-30 16:37:31
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Hdl348
发表于 2025-3-31 00:12:16
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天气
发表于 2025-3-31 01:39:48
Megasporogenesis and Megagametogenesis,llular embryo sac represents the life cycle of the haploid plant. This life cycle from megaspore to megagametophyte with the megagamete takes place in and is strongly related to the mother-plant, the sporophyte.
使苦恼
发表于 2025-3-31 07:36:33
Pollen Capture, Adhesion and Hydration,re, hydration and adhesion, but not concepts related to the physical capture of pollen by the stigma. Work on the aerobiology of pollen capture in species pollinated by wind is reviewed by Niklas (1987), and in water pollinated species by Ducker and Knox (1976). Many ecological works discuss aspects pollen transfer animal vectors.
ASTER
发表于 2025-3-31 12:01:52
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无效
发表于 2025-3-31 13:40:10
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Mystic
发表于 2025-3-31 18:21:54
rogenesis, pollen-stigma interaction and recognition, pollen tube growth, cytoskeleton, in vitro and in vivo gamete fusion, and incompatibility. The most advanced techniques employed in studies on reproductive biology of higher plants are described in detail.978-3-642-77679-3978-3-642-77677-9
侵害
发表于 2025-3-31 23:33:53
nd sales, but not to the research and development (R&D) and production units. Knowledge about the companies’ own competencies is underdeveloped as only 26 percent of firms are looking into the effects of personnel fluctuation and thus the effects of the drain of the firm’s knowledge base.