摘要
主要研究温度胁迫对杨梅叶片光合作用的影响,利用液相氧电极对温度胁迫后荸荠和东魁两个杨梅品种的光合速率和呼吸速率进行测定。结果发现,温度胁迫后,杨梅叶片的净光合速率明显低于对照(25℃),并且随着胁迫时间的延长,净光合速率进一步降低;而呼吸速率则相反,胁迫后,呼吸速率大于对照,并随着胁迫时间的延长而升高。其中胁迫温度越高或越低,对杨梅叶片的影响就越大。在胁迫解除后,除10℃处理的荸荠呼吸速率能恢复到正常水平,其他处理的杨梅叶片的净光合速率和呼吸速率均无法恢复到对照水平。表明温度胁迫对杨梅叶片光合作用的影响是明显的。另外此试验还研究了不同温度处理的杨梅叶片在不同反应液下(2℃和10℃、35℃和40℃)的净光合速率和呼吸速率的变化。其结论与前者一致。
Photosynthetic and respiratory rates of different waxberry varieties ("Biqi" and "Dongkui") underlow temperature stress (2℃ and 10 ℃ ) and high temperature stress (35 ℃ and 40 ℃ ) were determined by using an oxygen electrode. The results showed that net photosynthetic rate of Myrica rubra leaves reduced markedly when compared to control one (25℃) as the temperature stress being severer, while respiratory rate increased accordingly. Neither net photosynthetic rate nor respiratory rate came back to natural level while the Myrica rubra leaves freed from temperature stress except the ones under 10℃. Besides, studies on photosynthetic and respiratory rates under different temperatures (2, 10, 35 and 40℃) of NaHCO3 solution also showed the similar results. It proved that temperature played important'role in Photosynthesis of Myrica rubra leaves.
出处
《中国农学通报》
CSCD
北大核心
2009年第16期161-166,共6页
Chinese Agricultural Science Bulletin
基金
浙江省自然科学基金资助项目"高温胁迫下杨梅叶片D1蛋白周转机理研究"(Y307504)
国家"十一五"林业科技支撑计划项目"我国沿江滩地水生植被的生理生态特性研究"(2006BAD03A1502)
关键词
杨梅
温度胁迫
液相氧电极
光合速率
呼吸速率
Myrica rubra, temperature stress, oxygen electrode, photosynthetic rate, respiratory rate