|Table of Contents|

Effects of Rhizosphere High Temperature on Growth and Photosynthetic Physiology of Chinese Flowering Cabbages

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年14
Page:
50-55
Research Field:
Publishing date:

Info

Title:
Effects of Rhizosphere High Temperature on Growth and Photosynthetic Physiology of Chinese Flowering Cabbages
Author(s):
CHEN Lianzhu; ZHANG Xuebin; YANG Xiaofeng
(Sanya Science and Technology Academy for Crop Winter Multiplication，Sanya，Hainan 572000)
Keywords:
Chinese flowering cabbage; root system; chlorophyll fluorescence; photosynthetic parameters; enzymatic activity
PACS:
-
DOI:
10.11937/bfyy.20193738
Abstract:
Two varieties with different heat resistance were used.Adopted nutrient solution cultivation，using 28 ℃ as control(CK)，the effect of 35 ℃ heated 7 days in rhizosphere on the growth，root system，chlorophyll fluorescence，photosynthetic parameters and enzymatic activity of the two Chinese flowering cabbages were researched,in order to study the heat resistance for the hydroponic Chinese flowering cabbage.The results showed that，compared with the control，the stem diameter，plant height and shoot fresh weight of ‘Huinan 3’ and ‘Jiudian 60’ were reduced by 5.3% and 8.4%，12.5% and 4.5%，14.2% and 22.4%，respectively.Total length，total surface area，forks and total volume of roots decreased by 25.2% and 37.6%，25.5% and 34.4%,30.1% and 43.1%，22.9% and 31.8%，respectively.Fo，Fm，ΔF/Fm′，qP and NPQ decreased by 4.7% and 6.4%，2.9% and 3.6%，15.7% and 4.3%，11.8% and 4.7%，7.3% and 6.1%，respectively.Pn and WUE decreased by 6.9% and 23.9%，13.1% and 19.9%，while Ci increased by 2.6% and 3.7%，respectively.Gs and Tr of ‘Huinan 3’ were increased，while ‘Jiudian 60’ decreased.SOD，POD and CAT activities decreased by 1.4% and 3.0%，38.8% and 51.6%，11.2% and 38.4%.The influence of high rhizosphere temperature on ‘Jiudian 60’ was greater than ‘Huinan 3’，while the shoot fresh weight，total length of roots，Pn and CAT had great difference between this two flowering cabbages，and could be priority considered as the heat resistance indicators for Chinese flowering cabbages.

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Last Update: 2020-09-15