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Field Evaluation of New Promising Sugarcane Cultivars for Cold Tolerance in Guangxi, China

机译：广西广西耐寒甘蔗栽培品种现场评价

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摘要

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.
机译：甘蔗经常遭受中国广西的低温胁迫。在该研究中，在叶绿素含量（CHL），叶绿素荧光参数，质膜膜渗透率（PMP）和丙二醛（MDA）含量和视觉评分的基础上评估20个新的甘蔗品种的耐寒潜能。该研究是在广西大学的福山野外站的实验领域进行的。在冷应激期间，甘蔗品种的CHL减少，而PMP和MDA含量增加。此外，叶绿素荧光参数（FO，FM，FV / FM，FV / FO）也显示出冷应激的变化。然而，这些波动在不同的品种之间显着变化。同样地，甘蔗品种的耐寒性指数（CTI）的范围为0.03至0.76，描绘了评估中品种冷应激耐受性的巨大变化。具有耐寒性参数的生理指标的相关性分析显示CTI与PMP和MDA正相关，与CHL及其荧光参数负相关。基于整体评估，八个品种，viz。 GUC44，CP88-1762，CP96-1257，GUC50，GX13-4201，GX13-4222，CP97-2730和CP05-1762被鉴定为高耐寒性，而七种品种被分类为温和的耐受性，五个易感性，两个作为温和的高度耐受性，而且两个温和易感。本研究介绍了甘蔗的生理反应，以防止冷应激和筛选甘蔗基因型对这种普遍令人担忧的问题进行筛选的全包菌方法。此外，预计本研究将提供一些有前途的甘蔗种质资源，具有更好的冷应激耐受性。

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  • 来源
    《Sugar Tech》 |2020年第6期|1007-1017|共11页
  • 作者

    Xu Yuzhi; Chen Zhengxia; Huang Zhen; Jiang Hongtao; Deng Zuhu; Zhang Muqing;

  • 作者单位

    Guangxi Univ Guangxi Key Lab Sugarcane Biol Nanning 530005 Peoples R China;

    Guangxi Univ Guangxi Key Lab Sugarcane Biol Nanning 530005 Peoples R China;

    Guangxi Univ Guangxi Key Lab Sugarcane Biol Nanning 530005 Peoples R China;

    Guangxi Univ Guangxi Key Lab Sugarcane Biol Nanning 530005 Peoples R China;

    Guangxi Univ Guangxi Key Lab Sugarcane Biol Nanning 530005 Peoples R China|Guangxi Univ State Key Lab Conservat & Utilizat Subtrop Agr Bi Nanning 530005 Peoples R China;

    Guangxi Univ Guangxi Key Lab Sugarcane Biol Nanning 530005 Peoples R China|Guangxi Univ State Key Lab Conservat & Utilizat Subtrop Agr Bi Nanning 530005 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Cold damage; Chlorophyll fluorescence parameters; Cold tolerance evaluation; Plasma membrane permeability; Malondialdehyde content;

    机译：冷损伤;叶绿素荧光参数;耐寒性评价;血浆膜渗透性;丙二醛含量;

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