|Effect of diurnal irradiance on night-chilling tolerance of six rubber cultivars|
|Tian, Y. -H.; Yuan, H. -F.; Xie, J.; Deng, J. -W.; DDao, 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 10A degrees C) and two different irradiances (100 and 50% of full sunlight). Our results showed that all six cultivars could withstand nights at 10A degrees C for three days, while night chilling at 0 and 5A degrees 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.|
Reactive Oxygen Species
Soluble Sugar Content
Tian, Y. -H.,Yuan, H. -F.,Xie, J.,et al. Effect of diurnal irradiance on night-chilling tolerance of six rubber cultivars[J]. PHOTOSYNTHETICA,2016,54(3):374-380.
Tian, Y. -H.,Yuan, H. -F.,Xie, J.,Deng, J. -W.,DDao, X. -S.,&Zheng, Y. -L..(2016).Effect of diurnal irradiance on night-chilling tolerance of six rubber cultivars.PHOTOSYNTHETICA,54(3),374-380.
Tian, Y. -H.,et al."Effect of diurnal irradiance on night-chilling tolerance of six rubber cultivars".PHOTOSYNTHETICA 54.3(2016):374-380.
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