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The variation of reactive oxygen species scavenging enzymes and related gene expressions during occurrence and recovery of rubber tree tapping panel dryness

文献类型： 外文期刊

作者： Yuan, Kun 1 ; He, Jing 3 ; Hu, Yiyu 1 ; Feng, Chengtian 1 ; Wang, Zhenhui 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, Minist Agr, 4 Xueyuan Rd, Haikou 571101, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Rural Affairs Key Lab Biol & Genet Resources Rubb, 4 Xueyuan Rd, Haikou 571101, Hainan, Peoples R China

3.Hainan Univ, Inst Trop Agr & Forestry, 58 Renmin Rd, Haikou 570228, Hainan, Peoples R China

关键词： Hevea brasiliensis; Tapping panel dryness; ROS scavenging system; Enzyme; Gene expression

期刊名称：JOURNAL OF RUBBER RESEARCH （ 影响因子：0.667； 五年影响因子：0.618 ）

ISSN： 1511-1768

年卷期： 2021 年 24 卷 3 期

页码：

收录情况： SCI

摘要： Tapping panel dryness (TPD) in rubber tree (Hevea brasiliensis) is a complex physiological disorder which causes a serious loss of natural rubber yield. Many studies have been done to uncover the mechanism of TPD occurrence, but the mechanism remains unclear. Previous reports suggested that TPD occurrence might result from the over-generation of reactive oxygen species (ROS). To clarify the roles of ROS scavenging system in TPD response, rubber trees were stimulated by ethephon to induce TPD, and the resultant TPD trees were treated with 1-methylcyclopropene to induce their recovery. The latex samples were collected during the TPD occurrence and recovery to analyze the enzyme activities of catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione peroxidase (GPX) and peroxidase (POD), and the transcript expression of corresponding genes including HbCAT, HbCuZnSOD, HbAPX, HbGPX and HbPOD. The results showed that the activities of these ROS scavenging enzymes and expressions of the related genes got changed during the TPD occurrence and recovery, which suggests that the ROS scavenging genes and their corresponding enzymes were associated with TPD occurrence and recovery. Furthermore, these genes were also regulated by hydrogen peroxide (H2O2) and various hormone treatments, such as methyl jasmonate, salicylic acid, abscisic acid and so on. All these results suggest that the ROS scavenging genes and their corresponding enzymes are involved in responses to TPD, H2O2 and different hormones in rubber tree.

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