Response Characteristics of Leaf Water Potential in Different Growth Stages of Amorpha fruticosa Seedlings to Drought Stress and Re-watering
FENG Shu-lin1, LI Bo-yuan1, LV Guo-li1, HUANG You1, WANG Jin-xin2
1. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, China; 2. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
Abstract：In order to reveal the response characteristics of Amorpha fruticosa seedlings leaf water potential at different growth stages to soil drought and re-watering environment,a pot experiment was carried out. The results showed that soil moisture,drought duration,growth stage,as well as the interaction among the three factors had significant effects on leaf water potential of A. fruticosa seedlings (P<0.01). With the aggravation of drought,the seedling leaf water potential decreased while the water stress index increased. Under the condition of 40% soil relative water content,the leaf water potential of seedlings decreased the most. In addition,in the initial and fast growth period of 15 days drought and in late growth stage of 30 days drought,the leaf water potential decreased by 0.71 MPa,1.12 MPa and 0.58 MPa,respectively. The leaf water potential had a compensating effect after re-watering. With the extension of the time after re-watering,the leaf water potential of the three seedlings growth stages gradually recovered. The recovery rate was closely related to drought degree,drought duration and growth stage. However,all indexes recovered to close to the control level after 72 hours of re-watering.
冯树林, 李博渊, 吕国利, 黄优, 王进鑫. 紫穗槐幼苗不同生长阶段叶水势对干旱胁迫与复水的响应特征[J]. 草地学报, 2020, 28(5): 1363-1371.
FENG Shu-lin, LI Bo-yuan, LV Guo-li, HUANG You, WANG Jin-xin. Response Characteristics of Leaf Water Potential in Different Growth Stages of Amorpha fruticosa Seedlings to Drought Stress and Re-watering. Acta Agrestia Sinica, 2020, 28(5): 1363-1371.
Zheng H F,Zhang X,Ma W J,et al. Morphological and physiological responses to cyclic drought in two contrasting genotypes of Catalpa bungei[J]. Environmental and Experimental Botany,2017(138):77-87
Liu J W,Zhang R H,Zhang G C,et al. Effects of soil drought on photosynthetic traits and antioxidant enzyme activities in Hippophae rhamnoides seedlings[J]. Journal of Forestry Research,2017,28(2):255-263
[19]
Yan W M,Zhong Y Q W,Shangguan Z P. Rapid response of the carbon balance strategy in Robinia pseudoacacia and Amorpha fruticosa to recurrent drought[J]. Environmental and Experimental Botany,2017(138):46-56
[20]
Adnan M Y,Hussain T,Asrar H,et al. Desmostachya bipinnata manages photosynthesis and oxidative stress at moderate salinity[J]. Flora,2016(225):1-9
Martinez C,Roux C,Jauneau A,et al. Effect of water potential on the development of an haploid strain of Sporisorium reilianum f.sp. zeae[J]. Plant and Soil,2003,251(1):65-71
Schimpl F C,Ferreira M J,Jaquetti R K,et al. Physiological responses of young Brazil nut (Bertholletia excelsa) plants to drought stress and subsequent rewatering[J]. Flora,2019(252):10-17
2020, Vol. 28 
