Effect of Water Stress on Physiological Characteristics of Potato Cultivars with Different Maturities
YAN Wenyuan☆，QIN Junhong☆，DUAN Shaoguang，XU Jianfei，JIAN Yinqiao，JIN Liping，LI Guangcun*
Key Laboratory of Biology and Genetic Breeding of Tuber Crops，Ministry of Agriculture and Rural Affairs，Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China
Abstract：In order to clarify the impact of soil water deficit on growth and development of potato cultivars with different maturities，this paper conducted pot experiment and studied the effects of 4 soil relative water content regimes（W1，75%-85%；W2，55%-65%；W3，35%-45%；W4，15%-25%）on plant height，relative chlorophyll content，fresh weight of organs，photosynthetic characteristics，yield and water use rate of 7 potato cultivars with different maturities．The results indicated that under all water stress the average falling ranges of plant height and intercellular CO2 concentration of early-maturing varieties were greater than
that of the late-maturing varieties．Under severe drought stress（soil relative water content 15%-25%）the average declining ranges of tuberization number and yield of single plant in early-maturing varieties were all greater than that of the late-maturing varieties；while，the average falling ranges of net photosynthetic rate，transpiration rate and stomatal conductance were all less than that of the late-maturing varieties．Considering various indicators，both early-maturing and late-maturing varieties could be planted under light and moderate drought stress（soil relative water content 35%-85%）．Late-maturing potato varieties were more suitable to be cultivated under severe drought stress．
闫文渊，秦军红，段绍光，徐建飞，简银巧，金黎平，李广存. 水分胁迫对不同熟性马铃薯生理特性的影响[J]. 中国蔬菜, 2022, 1(5): 44-52.
YAN Wenyuan☆，QIN Junhong☆，DUAN Shaoguang，XU Jianfei，JIAN Yinqiao，JIN Liping，LI Guangcun*. Effect of Water Stress on Physiological Characteristics of Potato Cultivars with Different Maturities. China Vegetables, 2022, 1(5): 44-52.
