Field Evaluation of New Promising Sugarcane Cultivars for Cold Tolerance in Guangxi, China
- PDF / 1,423,039 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 67 Downloads / 191 Views
RESEARCH ARTICLE
Field Evaluation of New Promising Sugarcane Cultivars for Cold Tolerance in Guangxi, China Yuzhi Xu1 • Zhengxia Chen1 • Zhen Huang1 • Hongtao Jiang1 • Zuhu Deng1,2 Muqing Zhang1,2
•
Received: 4 December 2019 / Accepted: 22 June 2020 Ó Society for Sugar Research & Promotion 2020
Abstract Sugarcane often suffers from low-temperature stress in Guangxi, China. In this study, the cold tolerance potential of 20 new sugarcane varieties was evaluated on the basis of chlorophyll content (Chl), chlorophyll fluorescence parameters, plasma membrane permeability (PMP) and malondialdehyde (MDA) content, and visual scoring. The study was conducted at the experimental field of Fushui Field Station of Guangxi University. Following the period of cold stress, the Chl of sugarcane varieties decreased, while PMP and MDA contents increased. Moreover, the chlorophyll fluorescence parameters (Fo, Fm, Fv/Fm, Fv/Fo) also showed changes as a result of cold stress. However, these fluctuations significantly varied among different varieties. Likewise, the cold tolerance index (CTI) of the sugarcane varieties ranged from 0.03 to 0.76 depicting a great variability in the cold stress tolerance of varieties under evaluation. The correlation analysis of physiological indicators with cold tolerance parameters revealed that CTI was positively correlated with PMP and MDA and negatively correlated with Chl and its
fluorescence parameters. Based on overall evaluation, eight varieties, viz. GUC44, CP88-1762, CP96-1257, GUC50, GX13-4201, GX13-4222, CP97-2730, and CP05-1762, were identified as a highly cold tolerant, while seven varieties were categorized as mild tolerant, five as susceptible, two as mild highly tolerant, and two as mild susceptible. This study offers an insight into physiological response of sugarcane against cold stress and an all-inclusive approach to screen sugarcane genotypes against this widespread issue of concern. Moreover, it is expected that this study will provide some promising sugarcane germplasm resources with better cold stress tolerance.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12355-020-00853-8) contains supplementary material, which is available to authorized users.
Sugarcane (Saccharum species hybrids) accounts for 90% of the total sugar production in China. The development and stability of the sugarcane industry are of considerable significance to increase the farmer’s income and national sugar security. Currently, China’s sugarcane cultivation is mainly distributed in Guangxi, Yunnan, Guangdong, and Hainan. Guangxi is one of the largest producing areas for sugarcane in China, and it shares more than 60% of sugarcane plantation area and sugar production in China for over 28 years. The sugar industry has become the mainstay of Guangxi’s economy and the most important economic source of farmer’s income and financial revenue in this region (Ming et al. 2017).
Yuzhi Xu and Zhengxia Chen contributed equally to this work. & Zuhu Deng [email protected]
Data Loading...
