|Table of Contents|

Changes of Physiological Indexes Related to the Synergistic Senescence Between Root and Leaf System in Muskmelon

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年19
Page:
44-49
Research Field:
Publishing date:

Info

Title:
Changes of Physiological Indexes Related to the Synergistic Senescence Between Root and Leaf System in Muskmelon
Author(s):
GAO Yuhong1; YAN Shenghui1; CHENG Zhiqiang2; ZHAO Weixing3
(1.Zhengzhou Technical College，Zhengzhou,Henan 450121；2.Kaifeng Agricultural and Forestry Research Institute，Kaifeng，Henan 475004；3.Institute of Horticulture，Henan Academy of Agricultural Sciences，Zhengzhou,Henan 450002)
Keywords:
muskmelon; leaf; root; synergistic senescence; related physiological indexes
PACS:
S 652
DOI:
10.11937/bfyy.20224769
Abstract:
Taking ‘Jinxiucuiyu’ muskmelon as test material，the investigation of root vigor and leaf SPAD value,and soluble protein and malondialdehyde （MDA） contents，protective enzyme activities in root and leaf from sitting melon stage to maturing stage were determined,physiological mechanism of synergistic senescence between root and leaf system in muskmelon was studied，in order to provide reference for the reasonable regulation of premature aging in the later growth stage of muskmelon.The results showed that the root vigor,leaf chlorophyll contents,and the soluble protein contents，the superoxide dismutase (SOD),catalase (CAT) activities of root and leaf initially increased from low to high and then declined，which reached the maximum value at 10-20 days after fruit setting (early stage of fruit expansion)，and that the MDA contents，peroxidase(POD) activities of root and 1eaf gradually increased.From the relationship of physiological characteristics between leaves and roots，the SOD，CAT，POD activities，and soluble protein contents of leaf were significantly higher than that of root the corresponding period，the MDA contents were less than that of root the corresponding period，and the SOD，CAT activities and MDA content between root and leaf were significantly different，In addition，the amplitude of relevant physiological changes in root was larger than that in leaf.In conclusion，the metabolic capacity was reduced of the root and leaf，and the photosynthetic products were deficient.Moreoverthe ability of protecting enzymes to scavenge reactive oxygen free radicals was reduced，aggravating the degree of membrane oxidation,and those led to the gradual senescence of plants duringthe late stage.In the aging process,the senescence of roots and leaves was closely related，and the senescence speed of roots was relatively fast，which aggravated the senescence of leaves.

References:

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Last Update: 2023-11-28