Physiological and ecological characteristics of Periploca sepium Bunge under drought stress on shell sand in the Yellow River Delta of China.

Scientific Reports
Xiao WangXue-Bin Cao

Abstract

This study investigated the physiological and ecological changes in P. sepium Bunge and elucidated the physiological regulatory mechanisms underlying the adaptation of P. sepium to drought stress in shell sand. Drought stress led to a significant decrease in the net photosynthesis rate (Pn) and respiration rate of leaves and a decrease in low-intensity light-use efficiency (LUE) and light ecological amplitude. An increase in drought stress led to a considerable decrease in the photosynthetic electron transport rate in the P. sepium leaves and a significant increase in the amount of light energy dissipated as heat. In addition, the photosynthesis process suffered from severe photoinhibition. P. sepium plants counteracted the effects of drought stress primarily by increasing their peroxidase (POD) activity and by regulating membrane lipid peroxidation by secreting greater numbers of osmotic adjustment substances (proline (Pro) and soluble sugars (Ss)) and malondialdehyde (MDA). As drought stress increased, both the stem sap flow rate and the cumulative sap flow of P. sepium decreased considerably. P. sepium Bunge adapts to drought stress through interregulatory activity between photosynthesis, water-related physiological activiti...Continue Reading

References

Jul 3, 2007·Journal of Plant Physiology·Eliane Cristina Gruszka VendruscoloLuiz Gonzaga Esteves Vieira
Sep 28, 2010·Plant Physiology and Biochemistry : PPB·Sarvajeet Singh Gill, Narendra Tuteja
May 12, 2017·Plant Physiology and Biochemistry : PPB·Evandro Alves VieiraValdemir Antônio Laura
Mar 20, 2019·Plant Physiology and Biochemistry : PPB·Xin-Pei LüJin-Lin Zhang
Aug 16, 2019·Journal of Plant Physiology·Márcia CarvalhoTeresa Lino-Neto

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