Effects of water stress on physiological characteristics during tomato seedlings period
HAO Shuxue, CAO Hongxia, WANG Hubing, PAN Xiaoyan
Northwest A&F University, Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China
Abstract:The aim of this study was to investigate the response on the physiological characteristics of tomato seedlings under water stress, providing theoretical reference for the water management and irrigation schedule during tomato seedlings period. The tomato type which selected for experiment was “Changfeng No.5”, and there were four water levels: full irrigation, mild, moderate and severe water stress. The indexes were measured every five days for a total of 20 days. The results indicated that under the water stress condition, the maximal photochemical efficiency(Fv/Fm), photochemical quenching coefficient(qP)and electron transport rate(ETR)decreased remarkably, and the performance of all the treatments was: T>T1>T2>T3. On the other hand, the stomatal density, length and width of T1, T2 and T3 decreased a lot compared to the control. Furthermore, the stomata deeply closed under severe water stress. The leaf antioxidant enzyme activities increased with the increasing of water stress levels. The physiological parameters that under the mild water stress have no obviously discrepancy compare to CK. Therefore, the reference irrigation regime: 50%~60% of field capacity can be used for reference in the tomato seedling stage.
郝舒雪, 曹红霞*, 王虎兵, 潘小燕. 水分胁迫对番茄幼苗生理特性的影响[J]. 排灌机械工程学报, 2018, 36(10): 943-947.
HAO Shuxue, CAO Hongxia, WANG Hubing, PAN Xiaoyan. Effects of water stress on physiological characteristics during tomato seedlings period. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(10): 943-947.
[1]HSIE B S, MENDES K R, ANTUNES W C, et al. Jatropha curcas L.(Euphorbiaceae)modulates stomatal traits in response to leaf-to-air vapor pressure deficit [J]. Biomass and bioenergy, 2015,81: 273-281.[2]SHEIKH MOHAMMADI M H, ETEMADI N, ARAB M M, et al. Molecular and physiological responses of Iranian Perennial ryegrass as affected by Trinexapac ethyl, Paclobutrazol and Abscisic acid under drought stress [J]. Plant physiology and biochemistry, 2017,111: 129-43.[3]WU X, YUAN J, LUO A, et al. Drought stress and rewatering increase secondary metabolites and enzyme activity in dendrobium moniliforme [J]. Industrial crops and products, 2016,94: 385-393.[4]马树庆, 王琪, 张铁林, 等. 吉林省中部玉米出苗率和产量对播种出苗期水分胁迫的反应及其气象评估 [J]. 应用生态学报, 2014, 25(2): 451-457. MA Shuqing, WANG Qi, ZHANG Tielin, et al. Response of maize emergence rate and yield to soil water stress in period of seeding emergence and its meteorological assessment in central area of Jilin Province[J].Chinese journal of applied ecology, 2014, 25(2): 451-457.(in Chinese)[5]林琭, 汤昀, 张纪涛, 等. 不同水势对黄瓜花后叶片气体交换及叶绿素荧光参数的影响 [J]. 应用生态学报, 2015, 26(7): 2030-2040. LIN Lu, TANG Yun, ZHANG Jitao, et al. Effects of different water potentials on leaf gas exchange and chlorophyll fluorescence parameters of cucumber during post-flowering growth stage [J]. Chinese journal of applied ecology, 2015, 26(7):2030-2040.(in Chinese)[6]刘佳, 郁继华, 徐秉良, 等. 干旱气候条件下水分胁迫对辣椒叶片生理特性的影响 [J]. 核农学报, 2012, 26(8): 1197-1203. LIU Jia, YU Jihua, XU Bingliang, et al. Effects of water stress on the physiological characteristcs of pepper leaves in arid climates [J]. Journal of nuclear agricultural sciences, 2012, 26(8): 1197-1203.(in Chinese)