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- Title
Effect of diurnal irradiance on night-chilling tolerance of six rubber cultivars.
- Authors
Tian, Y.-H.; Yuan, H.-F.; Xie, J.; Deng, J.-W.; Dao, X.-S.; Zheng, Y.-L.
- Abstract
The rubber tree ( Hevea brasiliensis) is an important tropical crop with a high economic value that has been successfully cultivated in Xishuangbanna, China. Xishuangbanna has a long dry season (November-February) with cold nights and frequent fog events. Thus, it is important to select chilling-tolerant cultivars in order to understand better the role of fog in protecting rubber tree from chilling-induced photodamage. In this study, we examined the photosynthetic responses of six rubber tree cultivars (Lan 873, Yunyan 77-2, Yunyan 77-4, GT1, Reken 523, and Reyan 733-97) to night-chilling stress (0, 5, and 10°C) and two different irradiances (100 and 50% of full sunlight). Our results showed that all six cultivars could withstand nights at 10°C for three days, while night chilling at 0 and 5°C impaired photosynthesis, which was indicated by photoinhibition, decrease of soluble protein content, and accumulation of malondialdehyde. Reken 523 and Reyan 733-97 were more sensitive to night chilling than other cultivars. Low irradiance (50% of full sunlight) after the chilling treatment apparently mitigated the effect of night-chilling stress. It indicates that frequent fog events after cold nights might greatly contribute to the success of rubber tree cultivation in Xishuangbanna.
- Subjects
SPECTRAL irradiance; CULTIVARS; CHLOROPHYLL spectra; REACTIVE oxygen species; GAS exchange in plants; SUGAR content of food; MALONDIALDEHYDE
- Publication
Photosynthetica, 2016, Vol 54, Issue 3, p374
- ISSN
0300-3604
- Publication type
Article
- DOI
10.1007/s11099-016-0192-z