Responses of plant growth, physiological, gas exchange parameters of super and non-super rice to rhizosphere temperature at the tillering stage
文献类型： 外文期刊
作者： Li, Shuying 1 ; Jiang, Haolin 1 ; Wang, Jianjun 1 ; Wang, Yandong 1 ; Pan, Shenggang 1 ; Tian, Hua 1 ; Duan, Meiyang 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, Guangzhou, Guangdong, Peoples R China
2.China Agr Univ, Coll Agron & Biotechnol, Beijing, Peoples R China
3.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2019 年 9 卷
页码：
收录情况： SCI
摘要： Temperature is one of the critical factors affecting rice growth and yield production. This study investigated the effects of rhizosphere temperature at the tillering stage on the growth, physiological parameters and gas exchange attributes of two rice cultivars, i.e., the super rice cultivar Yuxiangyouzhan and the non-super rice cultivar Xiangyaxiangzhan, under hydroponic conditions. Three rhizosphere temperature treatments, i.e., a low-rhizosphere-temperature treatment (LT, nutrient solution at 17.5 +/- 1.5 degrees C), an ambient-temperature treatment (AT, nutrient solution at 27.5 +/- 1.5 degrees C), and a high-rhizosphere-temperature treatment (HT, nutrient solution at 37.5 +/- 1.5 degrees C), were applied in this study. The results showed significant differences in most of the rice growth and physiological and gas exchange parameters as a result of cultivar and rhizosphere temperature as well as their interaction. In addition, the marked reduction in total dry weight was positively correlated with a notable reduction in plant morphological parameters, such as the fresh and dry weight of the leaves and stem sheaths, and changes in gas exchange parameters. Moreover, antioxidant reactions were active in response to high and low rhizosphere temperatures, which varied in different plant tissues. These results suggested that the super and non-super rice were sensitive to high and low rhizosphere temperatures, respectively.
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