Plant Biotechnology Reports

, Volume 14, Issue 1, pp 111–120 | Cite as

Physiological responses of yellow-horn seedlings to high temperatures under drought condition

  • Hua Jin
  • Jixiang Zou
  • Linlin Li
  • Xinlei Bai
  • Tong Zhu
  • Junbao Li
  • Bingcheng Xu
  • Zhi WangEmail author
Original Article


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.


Drought–hot stress Membrane stability Gas-exchange parameters Chlorophyll fluorescence Xanthoceras sorbifolia Bunge 



This work was financially supported by Science Technology Yuanjiang Project of Xinjiang Uygur Autonomous Region (2016E02045), the Fundamental Research Funds for the Central Universities (DC201501070202), the Shaanxi Provincial Key R&D Program (2019TSLNY03-01) and the National Natural Science Foundation of China (31700335).

Author contributions

HJ and ZW: conceived and designed the experiments. JZ, LL and LB: performed the experiments. JZ, TZ and BX: analyzed the data. HJ, JL and ZW: contributed reagents/materials/analysis tools. HJ and ZW: wrote the paper.


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Copyright information

© Korean Society for Plant Biotechnology 2019

Authors and Affiliations

  1. 1.School of Environment and ResourcesDalian Minzu UniversityDalianPeople’s Republic of China
  2. 2.State Key Laboratory of Soil Erosion and Dryland Farming On the Loess Plateau, Institute of Soil and Water ConservationNorthwest A&F UniversityYanglingPeople’s Republic of China
  3. 3.Shaanxi Institute of Desertification ControlYulinPeople’s Republic of China

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