植物营养与肥料学报2011，Vol.17Issue(3)：665-673,9.
外源NO 对缺铁胁迫下花生生理特性的影响
Effects of exogenous nitric oxide on physiological characteristics of peanut under iron-deficient stress
摘要
Abstract
Nitric oxide (NO) plays an important role in crop growth and development. A hydroponic experiment was conducted to investigate the effects of sodium nitroprusside (SNP), a NO donor, on seedling growth, root activity, chlorophyll, photosynthetic characteristics, active oxygen metabolism and mineral element contents in peanut (Arachis hypogaea Linn. ) plants and the change of pH in the culture medium. There were three treatments, 0,10 and 100 μmol/L Fe( Ⅲ )-EDTA. The results show that the plant growth, root activity, net photosynthetic rate (Pn), transpiration rate (T r), stomatal conductance (Gs) and active oxygen metabolism are significantly increased under the application of 250 μmol/L SNP, while the intercellular CO2 concentration (Ci), the contents of MDA and phosphorus(P) are decreased. The effects are more significant under the Fe( Ⅲ )-EDTA concentration of 0 and 10 μmol/L than those of 100 μmol/L. Compared with the treatments of0, 10 and 100 μmol/L Fe( Ⅲ )-EDTA, the contents of active Fe of leaves at 20 days' cultivation are significantly increased by 130. 7％, 136. 4％ and 56. 1％ under the treatments of SNP +0, 10 and 100 μmol/L Fe( Ⅲ )-EDTA. At the same time the total iron content of the plants, the percentage of shoot's total iron absorption to that of the pants are also significantly increased.These indicate that the NO donor can increase the transportation of iron and the efficiency of utilization of iron and then alleviate the damage of Fe stress. The exogenous NO can increase the chlorophyll contents, carotenoid content and the ratio of chlorophyll a and chlorophyll b. Under Fe( Ⅲ )-EDTA concentration of 0 and 10 μmol/L, the application of SNP obviously lowers the pH of nutrient medium, and the pH is the lowest at 14 h.关键词
一氧化氮/缺铁胁迫/花生/生理特性分类
农业科技引用本文复制引用
张秀玮,张民,王全辉,邱现奎,胡国庆,董元杰..外源NO 对缺铁胁迫下花生生理特性的影响[J].植物营养与肥料学报,2011,17(3):665-673,9.基金项目
"十二·五"国家科技支撑计划项目(2011BAD11B01 （）
2011BAD11B02) （）
国家"948"项日(2011-G30)项目资助. （2011-G30）
