低氧环境对水稻萌发生长及生化指标的影响  

Rice germination and biochemical indicator variation in the hypoxic condition

作　　者：于洋 苏耀华 张春龙 杨米 李正和 张江丽[1] 普世皇 Phongsai Channarong 李娟[1] 金寿林[1] 文建成[1] YU Yang;SU Yaohua;ZHANG Chunlong;YANG Mi;LI Zhenghe;ZHANG Jiangli;PU Shihuang;PHONGSAI Channarong;LI Juan;JIN Shoulin;WEN Jiancheng(Rice Research Institute,Yunnan Agricultural University,Kunming 650201,China;Seeds Management Station of Yuan yang County,Yuanyang 652112,China)

机构地区：[1]云南农业大学稻作研究所,昆明650201 [2]元阳县种子管理站,云南元阳662400

出　　处：《扬州大学学报（农业与生命科学版）》2020年第4期16-20,共5页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：云南省重点新产品开发计划项目(2015BB015);云南省院士工作站项目(2018IC065)。

摘　　要：以1 126份水稻材料为试验材料,采用5 cm静止水层对其幼苗耐低氧能力进行鉴定,测定耐低氧材料的相关生化指标。结果表明:低氧环境中绝大部分材料胚芽鞘能伸长,但仅约2.8%材料的幼苗顶端能超过5 cm水层表面并正常生长;淹水幼芽在第4天出现生长缓慢,不耐低氧材料此后一直生长缓慢或停止,而耐低氧材料在第6天能恢复生长直至顶端突破水表面层;在低氧和正常条件下,耐低氧材料的可溶性糖含量、淀粉酶活性和叶绿素含量均明显高于同期不耐低氧材料,而丙二醛含量明显较低。耐低氧材料表现出幼苗和胚根伸长快、淀粉酶活性高、可溶性糖含量多、丙二醛含量少的特征。It carried out researches to identify the hypoxia tolerance for 1 126 of seedling growth of rice materials and check the response of biochemical indicators of tolerant genotypes under flooded water about the 5.0 cm. The results indicated that most of the rice materials could elongated coleoptiles under hypoxic condition, but only about 2.8% of the seedlings growth above the water surface of 5 cm, absorbing enough oxygen to restore normal growth;During hypoxic condition the seedlings began to grow slowly on the 4th day, since then intolerant genotypes still grown slowly or stopped, while tolerant genotypes could rapid growth again on the 6th day until its top extend above the water surface for gas exchange. In hypoxic and normal oxygen conditions, soluble sugar content, amylase activity and chlorophyll content of tolerant genotypes were significantly higher than those of intolerant genotypes in the same period, but malondialdehyde content was significantly lower. The adaptive features for tolerant genotypes were rapid elongation of seedlings and radicles, high amylase activity, high soluble sugar content, and low malondiadehyde content.

关 键 词：水稻 低氧环境 萌发 胚芽鞘 生化指标 

分 类 号：S511[农业科学—作物学]