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在谷物种子中,即便供给其水分,胚、胚乳组织充分含水仍不开始发育或不发芽,称这种状态为休眠。这是胚停止继续发育的状态。从胚发育这点看,通常动物胚发育是不停地持续进行;而种子植物胚的发育会暂时停止,而采取种子这种状态。种子胚发育停止时,种子干燥、胚或糊粉层被抑制在极低的代谢状态。这种种子干燥状态奉身并非休眠。即便吸水后休眠种子内水分含量增加,大量基因开始转录,但仍不发芽这一点表明:除因干燥导致代谢下降外,在种子的发育过程中产生了某种阻止胚继续发育的机制。 1.种子休眠的发展在研究了多种植物收获时休眠种子的休眠打破问题。然而,当穗发芽成为问题时,弄清在种子发育过程中,休眠机制是如何产生的。而且又是如何随种子成熟
In cereal seeds, embryos and endosperm tissues, even when supplied with water, do not begin to develop or germinate, and the condition is dormant. This is the state where the embryo stops growing. From the embryo development point of view, usually animal embryo development is constantly continuing; and seed embryo development will temporarily stop, and to take this state of the seed. When seed embryo development stops, the seed is dried, and the embryo or aleurone layer is inhibited in an extremely low metabolic state. Drying of this seed is not dormant. Even if the moisture content of the dormant seeds after water absorption increases, a large number of genes begin to transcribe, but they still do not germinate. This shows that in addition to the metabolic decline caused by the drying, some mechanism is produced during the seed development to prevent the embryo from continuing to develop. 1. The development of seed dormancy In studying the dormancy breaking of dormant seeds when harvesting a variety of plants. However, when sprouting is a problem, find out how hibernation occurs during seed development. And how mature with the seed