Physiological Responses of Chionanthus retusus Seedlings to Drought and Waterlogging Stresses

نویسندگان

چکیده

Understanding the adaptability of Chionanthus retusus Lindl. et Paxt. to extreme water conditions will help in exploring potential application this species barren mountains. Three-year-old seedlings were used a greenhouse pot experiment that analyzed effect different moisture gradients on growth, photosynthetic and fluorescence characteristics, protective enzyme system, osmotic substance regulation cell membrane damage. The results indicated C. can effectively grow at relative soil content 44.6% above maintain growth for 20 days under flooded conditions. Under drought stress, net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration (Tr), intercellular carbon dioxide concentration (Ci) all showed trend gradual decrease. change was similar waterlogging maximal quantum yield PSII photochemistry (Fv/Fm), actual photochemical efficiency (ΦPSII), quenching coefficient (qP), electron transport (ETR) decreased as deepened. Malondialdehyde (MDA) first then increased. However, superoxide dismutase (SOD) activity content, peroxidase (POD) proline (Pro) increasing decreasing. had good slight treatment group but intolerance high group, which could still last approximately 21 days. found have strong stress be an afforestation tree

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ژورنال

عنوان ژورنال: Forests

سال: 2023

ISSN: ['1999-4907']

DOI: https://doi.org/10.3390/f14020429