摘要
海拔是限制马铃薯光合生理特性的主要生态因子之一,因此研究不同海拔对马铃薯叶片的生理特性影响具有重要的意义。不同海拔的马铃薯品种的光合生理特性因海拔而异。在海拔不同的云南皎西村(890m)、转龙镇(1 998m)和炭山村(2 988m)3个地区正常氮素水平下种植的盈江小洋芋、剑川红、老家洋芋3个马铃薯地方品种为试验材料,分析了海拔梯度对马铃薯地方品种叶片光合特性和荧光特性的影响。研究结果:高海拔品种老家洋芋从低海拔到高海拔地区的净光合速率(P_n)、气孔导度(G_s)、蒸腾速率(T_r)等光合指标相对其他马铃薯地方品种变化幅度较大,因此认为老家洋芋对海拔升高导致的环境胁迫的适应性最强。从荧光特性可以看出3个马铃薯地方品种在应对海拔升高时光保护机制存在差异。
Altitude is one of the main ecological factors limiting photosynthetic physiological characteristics of potato （Solanum tuberosum L.）, and it has a great significance to study the effects of different altitudes on the physiological characteristics of potato leaves. Photosynthetic characteristics of potato at different altitudes depends on various altitudes. In this study, there were three potato species cultivars, Yingjiangxiaoyangyu, Jianchuanhong and Laojiayangyu that were cultivated under the normal nitrogen level, which were experimented in three areas of Jiaoxi （890m）, Zhuanlong （1 998m） and Tanshan （2 988m） to analyze the effects of altitude gradient on photosynthetic characteristics and fluorescence characteristics of potato landraces. The results showed that the net photosynthetic rate, stomatal conductance and transpiration rate of the high-altitude cultivars from the low altitude to the high altitude area were changed relatively larger than those of other potato varieties. As far as Laojiayangyu was considered to be the most adaptable variety for the environmental stress caused by the altitude, it could be seen that the three potato varieties had different photoprotective mechanisms in response to elevated altitudes.
出处
《作物杂志》
CAS
北大核心
2017年第5期93-99,共7页
Crops
基金
国家自然科学基金青年基金(31201147)
云南省现代农业马铃薯产业技术体系建设栽培研究生岗位专家专项经费(云财教[2014]160号)
关键词
海拔梯度
马铃薯地方品种
光合特性
荧光特性
Altitude gradient
Potato local species
Photosynthetic characteristics
Fluorescence characteristics
