Photosynthetica 2018, 56(4):1353-1364 | DOI: 10.1007/s11099-018-0846-0

Morphological and ecophysiological plasticity in dioecious plant Populus tomentosa under drought and alkaline stresses

Y. W. Lu1,2, X. L. Miao1, Q. Y. Song1, S. M. Peng3, B. L. Duan2,*
1 School of Life Sciences, Liaocheng University, Liaocheng, China
2 Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
3 College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, China

Morphological and ecophysiological traits showed by male and female Populus tomentosa Carr. trees were studied under various degrees of water and alkaline stresses. The results showed that different adaptations to drought and alkaline stresses were adopted by each gender; males possessed a much higher tolerance to both stresses compared to females. In contrast to females, the males exhibited a lower inhibition in total biomass, total leaf area, net photosynthetic rate, stomatal conductance, leaf carbon and nitrogen concentrations as well as water- and nitrogen-use efficiency in response to drought and alkaline stresses. Nevertheless, compared to the males, the females showed a higher plasticity in root biomass/shoot biomass ratio, fine root/coarse root ratio, and intrinsic water-use efficiency, indicating that the males and females differed in some of trade-offs between growth and stress defence to maximize water and nitrogen gains under both stress conditions.

Keywords: alkaline stress; cuttings; drought; gender; plasticity index; poplar

Received: August 24, 2017; Accepted: March 9, 2018; Prepublished online: December 1, 2018; Published: November 1, 2018Show citation

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Lu, Y.W., Miao, X.L., Song, Q.Y., Peng, S.M., & Duan, B.L. (2018). Morphological and ecophysiological plasticity in dioecious plant Populus tomentosa under drought and alkaline stresses. Photosynthetica, 56(4), 1353-1364. doi: 10.1007/s11099-018-0846-0.
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