摘要
以耐低温番茄品系L402-F和冷敏感品系自交系J2为试材,15℃为对照,研究6℃夜低温不同时长处理对光合指标和可溶性糖类的影响及相关性分析。结果表明:不同时长夜低温胁迫导致L402-F和J2番茄叶片的净光合速率、Rubisco羧化速率和Fv/Fm均下降,呈现15℃>6℃3 h>6℃9 h,L402-F的下降幅度比J2的下降幅度小,品种间存在着一定的差异;低温胁迫后,碳水化合物在L402-F和J2叶片中积累,并且随着处理小时数的增多和处理时间的延长,碳水化合物的积累增多;对净光合速率与各指标间进行相关性分析表明,L402-F叶片中净光合速率的下降与淀粉含量的大量积累有关,而导致J2叶片中净光合速率下降可能与Rubisco羧化速率和淀粉积累有着密切的联系。
Tomato cultivar of resistant to cold L402-F and cold-sensitive tomato cultivar J2 was taken as experimental materials.The effects of 6℃ treatment of low night temperature at different periods of time on photosynthetic indicators and the impact of soluble sugars and correlation analysis were studied using 15℃ as control.The results showed that Net photosynthetic rate,Rubisco carboxylation rate and Fv / Fm of tomato leaf of L402-F and J2 decreased in low night temperature at different duration,showing 15℃6℃3 h6℃9 h,The decline of L402-F was smaller than J2,there were some differences between species.After cold stress,the carbohydrates were accumulated in the leaves of J2 and L402-F,with the increasing of treatment hours and extension of treatment days,carbohydrate accumulations were increased.The correlation between net photosynthetic rate and each index showed that the decrease of net photosynthetic rate is related with the generous accumulation of starch;but Rubisco carboxylation rate and starch accumulation may lead to the decline of net photosynthetic rate.
出处
《华北农学报》
CSCD
北大核心
2011年第4期97-103,共7页
Acta Agriculturae Boreali-Sinica
基金
大宗蔬菜产业技术体系岗位科学家专项(Nycytx-35-gw23)
公益性行业(农业)科研专项(nyhyzx07-007)
关键词
夜间低温
番茄
净光合速率
可溶性糖
Low night temperature
Tomato
Net photosynthetic rate
Soluble sugar
