小麦冷源及其性状特征的研究

 多年试验研究表明 ,自然界存在小麦冷源 ,它是一种冷温供体材料 ,有较强的降温作用 ,当受体小麦接受冷温供体的配子后 ,其后代冠层温度呈普遍下降态势 ,且部分受体小麦的温度型可由非冷型转化为冷型 ,明显提高了代谢功能。小麦冷源和不具有供冷能力的一般小麦相比 ,不但小麦群体第二热源温度及本身的体温偏低 ,且在根系活力、麦芒衰败速率、叶片功能期以及叶片的叶绿素含量、可溶性蛋白质含量、超氧化物歧化酶活性、净光合速率等方面均具有鲜明特点 ,这为小麦冷源的识别和选择提供了一定的生态生理依据。

Study on Wheat Cold Source and Its Characters

On the basis of tests and studies for many years, wheat cold source has been discovered in natural world. It is a donor material supplying a low temperature and causing stronger cooling effect, that is, the canopy temperature of its succeeding era can be descended universally and some of non cold type accepter wheat can turn into cold type wheat having good metabolic functions under the condition of that accepter wheat accepts the gamete of donor wheat supplying a low temperature. Contrast between wheat cold source and general wheat not having ability supplying a low temperature shows that wheat cold source's second heat source temperature and plant temperature not only are lower than those of general wheat but its root system activity, speed with the awn's yellowing, functional period of leaf, chlorophyll content, soluble protein content, SOD activity, net photosynthetic rate, etc. are also more excellent than those of general wheat, and these all provide certain ecological and physiologic bases for the distinction and selection of wheat cold source.