文献类型： 外文期刊
作者： Sui, Yanghui 1 ; Gao, Jiping 1 ; Shang, Quanyu 3 ;
作者机构： 1.Shenyang Agr Univ, Rice Res Inst, Key Lab Northeast Rice Biol & Genet & Breeding, Minist Agr,Coll Agron, Shenyang, Liaoning, Peoples R China
2.Liaoning Acad Agr Sci, Corn Res Inst, Shenyang, Liaoning, Peoples R China
3.Heilongjiang Acad Agr Sci, Heihe Branch, Rice Res Dept, Heihe, Heilongjiang, Peoples R China
关键词： macronutrient; carotenoid; leaf senescence; stay-green plant; plant density; antioxidant enzyme
期刊名称：PLANT SOIL AND ENVIRONMENT （ 影响因子：1.799； 五年影响因子：2.169 ）
ISSN： 1214-1178
年卷期： 2019 年 65 卷 6 期
页码：
收录情况： SCI
摘要： A field experiment was carried out in the years 2008-2011 in China to assess the nitrogen metabolism enzyme activities and photosynthetic characteristics in stable-yielding stay-green rice (Oryza sativa L.) cv. Shennong196. The results showed that higher levels of nitrogen content, nitrate reductase activity, and glutamine synthetase activity occurred in leaves of cv. Shennong196 compared with cv. Toyonishiki (control). Leaf color of cv. Shennong196 was positively correlated with nitrogen levels and nitrogen metabolism enzyme activities (P < 0.05). Superoxide dismutase activity and malondialdehyde contents were 18.53 unit/g fresh weight and 3.32 nmol/g, respectively, which were lower in flag leaves of cv. Shennong196 than cv. Toyonishiki. Cv. Shennong196 had a higher level of net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, and transpiration rate in flag leaves of diurnal variation of photosynthesis at the ripening stage. The high net photosynthetic rate in cv. Shennong196 was positively correlated with the stomatal density of flag leaves (P < 0.01). Considering the yield-increasing potential and to prevent premature senescence of crop, these traits of cv. Shennong196 are useful for improved rice cultivar.
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