Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock
Photosynthesis is one of the most thermo-sensitive processes in plants. Although the severity of heat stress could be attenuated by grafting approach, the primary damaged site of photosynthesis system under heat stress and the regulatory mechanism of rootstock-mediated heat tolerance are poorly unde...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2016-06-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.00746/full |
| _version_ | 1831808271949758464 |
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| author | Hao eLi Hao eLi Golam Jalal eAhammed Guona eZhou Xiaojian eXia Jie eZhou Kai eShi Jingquan eYu Yanhong eZhou Yanhong eZhou |
| author_facet | Hao eLi Hao eLi Golam Jalal eAhammed Guona eZhou Xiaojian eXia Jie eZhou Kai eShi Jingquan eYu Yanhong eZhou Yanhong eZhou |
| author_sort | Hao eLi |
| collection | DOAJ |
| description | Photosynthesis is one of the most thermo-sensitive processes in plants. Although the severity of heat stress could be attenuated by grafting approach, the primary damaged site of photosynthesis system under heat stress and the regulatory mechanism of rootstock-mediated heat tolerance are poorly understood. In the current study, cucumber plants grafted onto their own roots and heat-tolerant luffa roots were exposed to root-zone heat (25/40 °C) and aerial heat (40/25 °C) individually and in combination (40/40 °C) to understand the response of photosynthetic process by investigating energy absorption and distribution, electron transport in photosystem (PS) II and I, and CO2 assimilation. According to the results, root-zone heat stress inhibited photosynthesis mainly through decreasing Rubisco activity, while aerial heat stress mainly through inhibiting PSII acceptor side. The imbalance in light absorption and utilization resulted in accumulation of reactive oxygen species that caused damage to photosynthetic apparatus, forming a vicious cycle. On the contrary, grafting cucumber onto heat-tolerant luffa rootstock alleviated heat-induced photosynthetic inhibition and oxidative stress by maintaining higher root vitality, HSP70 accumulation, and antioxidant potential. |
| first_indexed | 2024-12-22T20:20:16Z |
| format | Article |
| id | doaj.art-51b7aff3ba7d4e4093a1b088378aab08 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-22T20:20:16Z |
| publishDate | 2016-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-51b7aff3ba7d4e4093a1b088378aab082022-12-21T18:13:51ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2016-06-01710.3389/fpls.2016.00746183933Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstockHao eLi0Hao eLi1Golam Jalal eAhammed2Guona eZhou3Xiaojian eXia4Jie eZhou5Kai eShi6Jingquan eYu7Yanhong eZhou8Yanhong eZhou9Zhejiang UniversityNorthwest A&F UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyPhotosynthesis is one of the most thermo-sensitive processes in plants. Although the severity of heat stress could be attenuated by grafting approach, the primary damaged site of photosynthesis system under heat stress and the regulatory mechanism of rootstock-mediated heat tolerance are poorly understood. In the current study, cucumber plants grafted onto their own roots and heat-tolerant luffa roots were exposed to root-zone heat (25/40 °C) and aerial heat (40/25 °C) individually and in combination (40/40 °C) to understand the response of photosynthetic process by investigating energy absorption and distribution, electron transport in photosystem (PS) II and I, and CO2 assimilation. According to the results, root-zone heat stress inhibited photosynthesis mainly through decreasing Rubisco activity, while aerial heat stress mainly through inhibiting PSII acceptor side. The imbalance in light absorption and utilization resulted in accumulation of reactive oxygen species that caused damage to photosynthetic apparatus, forming a vicious cycle. On the contrary, grafting cucumber onto heat-tolerant luffa rootstock alleviated heat-induced photosynthetic inhibition and oxidative stress by maintaining higher root vitality, HSP70 accumulation, and antioxidant potential.http://journal.frontiersin.org/Journal/10.3389/fpls.2016.00746/fullLuffaOxidative StressPhotosynthesisHsp70Heat stressGrafting |
| spellingShingle | Hao eLi Hao eLi Golam Jalal eAhammed Guona eZhou Xiaojian eXia Jie eZhou Kai eShi Jingquan eYu Yanhong eZhou Yanhong eZhou Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock Frontiers in Plant Science Luffa Oxidative Stress Photosynthesis Hsp70 Heat stress Grafting |
| title | Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock |
| title_full | Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock |
| title_fullStr | Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock |
| title_full_unstemmed | Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock |
| title_short | Unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock |
| title_sort | unraveling main limiting sites of photosynthesis under below and above ground heat stress in cucumber and the alleviatory role of luffa rootstock |
| topic | Luffa Oxidative Stress Photosynthesis Hsp70 Heat stress Grafting |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.00746/full |
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