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Open AccessArticle

Ecophysiological Responses of Carpinus turczaninowii L. to Various Salinity Treatments

by Qi Zhou 1,2, Man Shi 1,2, Zunling Zhu 1,2,3,* and Longxia Cheng 1,2
1
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
2
College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
3
College of Arts & Design, Nanjing Forestry University, Nanjing 210037, China
*
Author to whom correspondence should be addressed.
Forests 2019, 10(2), 96; https://doi.org/10.3390/f10020096
Received: 10 December 2018 / Revised: 22 January 2019 / Accepted: 22 January 2019 / Published: 25 January 2019
(This article belongs to the Special Issue Physiological Responses to Abiotic and Biotic Stress in Forest Trees)
Carpinus turczaninowii L., commonly known as hornbeam, has significant economic and ornamental importance and is largely distributed in the northern hemisphere, including parts of China and Korea, with high adaptation to harsh conditions in very unfertile soils. In this study, the ecophysiological responses of C. turczaninowii seedlings to various salinity stress treatments (NaCl: 0, 17, 34, 51, 68, and 85 mM) were studied for 42 days by determining stress-induced changes in growth parameters and biochemical markers. Salinity stress affected the values of all the examined parameters, both morphological and physiological, and caused the inhibition of plant growth, the degradation of photosynthetic capacity and stomatal behavior, a decrease in the photosynthetic pigments contents and relative water content, an increase in the Malondialdehyde (MDA) content and relative electrolytic conductivity, and the accumulation of Na+ and Cl content. The presence of relatively high concentrations of organic osmolytes, the activation of antioxidant enzymes, and the ionic transport capacity from the root to shoots may represent a constitutive mechanism of defence against stress in C. turczaninowii seedlings. Our results suggest that C. turczaninowii can tolerate salinity at low and moderate concentrations (17–51 mM) under nursery conditions and can be widely used in roadsides, gardens, parks, and other urban areas. View Full-Text
Keywords: Carpinus turczaninowii; salinity treatments; ecophysiology; photosynthetic responses; organic osmolytes; ion homeostasis; antioxidant enzymes Carpinus turczaninowii; salinity treatments; ecophysiology; photosynthetic responses; organic osmolytes; ion homeostasis; antioxidant enzymes
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Zhou, Q.; Shi, M.; Zhu, Z.; Cheng, L. Ecophysiological Responses of Carpinus turczaninowii L. to Various Salinity Treatments. Forests 2019, 10, 96.

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