| 摘要: |
| 为揭示木薯抗朱砂叶螨机理，以2个木薯品种‘新选048’和‘桂热4号’为材料，在朱砂叶螨发生危害时期，观察不同木薯品种受害程度并对其抗螨性进行鉴定，测定叶片单宁、可溶性糖、可溶性蛋白、游离脯氨酸及叶绿素的含量，分析各生理指标与朱砂叶螨危害程度的关系。结果表明，‘新选048 ’对朱砂叶螨的抗性优于‘桂热4号’。不同木薯品种，叶片单宁、可溶性糖、可溶性蛋白、游离脯氨酸及叶绿素含量不同；‘新选048’叶片单宁及叶绿素含量均高于‘桂热4号’，而可溶性蛋白、可溶性糖、游离脯氨酸含量则反之；螨害指数与单宁含量、叶绿素含量呈极显著负相关，与可溶性蛋白、可溶性糖、游离脯氨酸含量呈极显著正相关。木薯抗螨性与叶片中的可溶性糖、可溶性蛋白、游离脯氨酸、单宁、叶绿素含量密切相关，这些指标可作为木薯对朱砂叶螨抗性评价的主要指标。 |
| 关键词: 木薯 朱砂叶螨 抗螨性 叶片内含物 单宁 可溶性糖 |
| DOI：10.11841/j.issn.1007-4333.2020.05.02 |
| 投稿时间：2019-06-26 |
| 基金项目:广西科技计划(桂科AB18221127)；亚热带农业生物资源保护与利用国家重点实验室开放课题(SKLCUSA-b201609,SKLCUSA-b201704)；亚热带农业生物资源保护与利用国家重点实验室自主研究课题(SKLCUSA-a201802)；国家现代农业产业体系广西薯类产业创新团队“薯类产业功能专家”项目(nycytxgxcxtd-03-11-2) |
|
| Relationship between resistances of different cassava varieties to Tetranychus cinnabarinus and their leaves content |
|
WEI Wanling1,LUO Xinglu1,2*,PAN Xiaolu1,WU Meiyan1,LIU Shanting1,FAN Wujing1
|
| (1.College of Agriculture, Guangxi University, Nanning 530004, China;2.State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Nanning 530004, China) |
| Abstract: |
| To explore the physiological characteristics of the resistance to Tetranychus cinnabarinus, two cassava varieties ‘Xinxuan 048' and ‘GR4' were used as materials in this experiment. According to the observation on damaged to different cassavas, then evaluated its resistance, and determine the contents of soluble sugar, free proline, soluble protein, chlorophyll and tannin in leaves to analyze the relationship between cassava varieties with damage degree of T. cinnabarinus in the period of T. cinnabarinus hazards. The result showed that ‘Xinxuan 048' was resistant and ‘GR4' was susceptible to T. cinnabarinus with significant difference in disease index. Respectively, the ‘Xinxuan 048' had higher tannin and chlorophyll contents, but lower soluble sugar, soluble protein and free proline in leaves than those in ‘GR4'. There was significant negative correlation between chlorophyll and tannin contents and mite damage index, while there was significant positive correlation between free proline, soluble protein and soluble sugar and mite damage index. The cassava′s resistance to T. cinnabarinus was closely related to tannin and chlorophyll contents, soluble sugar, soluble protein and free proline in leaves, which could be used as main evaluation indicators for the resistance of cassava T. cinnabarinus. |
| Key words: cassava Tetranychus cinnabarinus resistance inclusions tannin soluble sugar |
