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Physiological responses of yellow-horn seedlings to high temperatures under drought condition.
- Source :
-
Plant Biotechnology Reports . Feb2020, Vol. 14 Issue 1, p111-120. 10p. - Publication Year :
- 2020
-
Abstract
- Drought and hot stresses are the primary limiting factors for the growth and seed production of yellow-horn (Xanthoceras sorbifolia Bunge), especially in Xinjiang Province of China. A better understanding of its physiological and biochemical characteristics under drought–hot stress is requisite for its efficient cultivation in the arid and semi-arid areas. In this study, the physiological and biochemical responses of 3-month-old yellow-horn seedlings were evaluated after 7 days of treatments of five temperatures (25 °C/20 °C, 30 °C/25 °C, 35 °C/25 °C, 40 °C/25 °C and 45 °C/25 °C) under two watering conditions [adequate water supply (HW): 80 ± 5% FC (field capacity); low water supply (LW): 40 ± 5% FC] by a pot experiment. The increased temperature (above to 35 °C) markedly aggravated the damage on biomass accumulation and membrane integrity of yellow-horn seedlings under the LW. The accumulation of soluble sugars and proteins exhibited a growing trend as the temperature increased from 25 to 40 °C, which declined when the temperature was higher than 40 °C except for the soluble protein accumulation under HW. In addition, captured responsive characteristics of the gas-exchange parameters and chlorophyll fluorescence have indicated that the combinations of high temperature (above to 35 °C) and LW induced significant decrease in photosynthetic activities of yellow-horn seedlings. All these results showed that the hot stress significantly aggravated the drought damage on yellow-horn plant growth, especially when the temperature increased above 35 °C under drought stress. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18635466
- Volume :
- 14
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Plant Biotechnology Reports
- Publication Type :
- Academic Journal
- Accession number :
- 141577613
- Full Text :
- https://doi.org/10.1007/s11816-019-00590-9