华北农学报2012，Vol.27Issue(6)：178-184,7.
不同形态氮素营养及水分胁迫条件下赤霉酸对水稻生理特性的影响
Effects of Gibberellic Acid on Rice Physiology under Different Nitrogen Form Nutrition and Water Stress Condition
摘要
Abstract
By using the method of nutrient solution culture and simulated water stress with PEG6000,the combination effects of nitrogen forms,water stress and exogenous gibberellic acid(GA3)on physiological attributes and growth of rice( Oryza sativa L. cv. , Jinyou 402) were studied. The trials had 15 treatments of three water conditions ( non-water stress, water stress, water stress and GA3 ) and five nitrogen nutrients conditions ( NH4+ -N/NO-3 -N of 0/100,25/75,50/50,75/25,100/0). The results obtained were as follows: Water stress reduced the leaf area, leaf relative water content ( RWC ) , chlorophyll concentration, but it increase proline accumulation in rice plant. GA3 largely enhanced the above physiological parameters to levels similar to control. Exogenous application of GA3 improved the water stress tolerance in rice plant by maintaining membrane permeability, enhancing chlorophyll concentration,leaf relative water content( RWC)and leaf area. Mixture of 25% NH4+ -N and 75% NO-3 -N was the best nitrogen nutrition condition for rice plant to relieve the water stress under water stress condition, but it was the nitrogen nutrition condition of 50% NH4＋ -N and 50% NO-3 -N in mixture of water stress and GA3 condition.关键词
铵态氮/硝态氮/水分胁迫/赤霉酸Key words
Ammonium/ Nitrate/ Water stress/ Gibberellic acid ( GA3 )分类
农业科技引用本文复制引用
高志红,陈晓远,谢宏娟..不同形态氮素营养及水分胁迫条件下赤霉酸对水稻生理特性的影响[J].华北农学报,2012,27(6):178-184,7.基金项目
广东省自然科学基金项目(9151200501000009) （9151200501000009）
广东省科技计划项目(2010B080703045) （2010B080703045）
