结缕草种子发育过程中生理生化变化的研究  

A study on the changes of physiology and biochemistry during zoysiagrass seed development

作　　者：马春晖[1] 韩建国[2] 孙洁峰 王栋[1] 

机构地区：[1]塔里木大学动物科学学院/新疆兵团塔里木畜牧科技重点实验室,新疆阿拉尔843300 [2]中国农业大学草地研究所,北京100094 [3]青岛海源草坪有限公司,山东胶州266300

出　　处：《草业学报》2009年第6期174-179,共6页Acta Prataculturae Sinica

基　　金：农业部"948"重大资助项目(202099);结缕草种子生产技术研究(横向课题)资助

摘　　要：本研究旨在探明结缕草种子发育过程中生理生化变化,为种子生产提供科学的理论依据,在山东胶州,结缕草盛花期后每隔3-5 d取1次种子样品,对其发育过程中的生理生化变化进行研究。结果表明,结缕草种子发育过程中含水量是先升高,而后逐步降低,而种子干、鲜重则逐渐增加,最后略有降低。可溶性糖含量变化总趋势是降低（5.0%）,而淀粉含量先升后降,再逐渐增加,最后保持在15.0%左右,种子酸性磷酸酯酶活性逐渐增强,且不同成熟度间的活性差异极显著（P〈0.01）。种子生长素（IAA）和赤霉素（GA）含量逐渐减少,而脱落酸含量是逐步增加,最后达72.7μg/100 g鲜重。综合考虑,结缕草适宜的收获期应在盛花期后36 d左右,即6月15日左右,此时种子活力强,含水量为26%28%,千粒重为0.89 g。This research aimed to provide a scientific theoretical basis for zoysiagrass seed production by investigating changes of physiology and biochemistry during seed development.Every three or five days,seeds of zoysiagrass were harvested after peak anthesis at Jiaozhou in Shandong province,and the changes in seed development were studied.The seed moisture content rose first,then gradually dropped.The fresh weight and dry weight of seeds slowly increased during seed development and finally decreased a little.The soluble sugar content of seeds decreased by about 5.0%.The starch content increased sharply and then slowly decreased,but stayed about 15.0% towards the end of development.The acid phosphoesterase activity of seeds harvested at different times were significantly increased（P〈0.01）.IAA and GA contents slowly reduced with seed development.However,the contents of ABA rose gradually and reached 72.7 μg/100 g fresh weight.In conclusion,the optimal harvest time was the 36th days after peak anthesis（about June 15） in this experiment,and when the seed vigor was better,its moisture content and 1 000-seed weight were 26%-28% and 0.89 g,respectively.

关 键 词：结缕草 种子 发育 

分 类 号：S688.4[农业科学—观赏园艺]