@Article{phyton.2022.017634,
AUTHOR = {Jinhai Liu, Rifang Lai, Longxin He, Pipeng Xing, Haowen Luo, Shuying Yang, Yingbin Zou, Xiangru Tang},
TITLE = {Foliar Application of Brassinolide Induced Regulation of Grain Yield and Quality, Antioxidant Responses and Aroma in Fragrant Rice},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {91},
YEAR = {2022},
NUMBER = {5},
PAGES = {1061--1071},
URL = {http://www.techscience.com/phyton/v91n5/46598},
ISSN = {1851-5657},
ABSTRACT = {Brassinolide (BR) is a new green plant growth regulator. The present field study was conducted on two fragrant rice cultivars (i.e., <i>Meixiangzhan-2</i> and <i>Xiangyaxiangzhan</i>) to study the effects of foliar application of BR on fragrant rice performance. At the heading stage, BR solutions at 0.05, 0.15, 0.25 and 0.50 mg L-1 were sprayed on fragrant rice at 600 liters per hectare; these treatments were named as BR1, BR2, BR3 and BR4, respectively. The treatment sprayed with distilled water was taken as a control (CK). Compared with CK, the BR2 treatment significantly enhanced the chlorophyll concentration and net photosynthetic rate for <i>Meixiangzhan-2</i>, and <i>Xiangyaxiangzhan</i>. The BR3 and BR4 treatments increased the concentrations of chlorophyll a, chlorophyll b and carotenoid, and also enhanced net photosynthetic rate by 31.91% and 40.43%, respectively. Higher grain yields were recorded in the BR2 treatment than on CK on <i>Meixiangzhan-2</i>, while on <i>Xiangyaxiangzhan</i>, the BR3 and BR4 treatments increased grain yield compared with CK. In relation to CK, higher head rice rates were recorded in the BR2 treatment for <i>Meixiangzhan-2</i>, and in the BR3 and BR4 treatments for <i>Xiangyaxiangzhan</i>. BR treatments (BR2 for <i>Meixiangzhan-2</i>, BR3 and BR4 for <i>Xiangyaxiangzhan</i>) also significantly enhanced the activities of GPX, SOD and CAT by 10.22% to 23.00%, and reduced the malonaldehyde concentration. In addition, we observed that some BR treatments (BR2 for <i>Meixiangzhan-2</i>, BR3 and BR4 for <i>Xiangyaxiangzhan</i>) decreased the grain 2-acetyl-1-pyrroline concentration of fragrant rice.},
DOI = {10.32604/phyton.2022.017634}
}