|Table of Contents|

Regulation of Exogenous Ca2+Addition on the Activities of Enzymes Related to Photosynthesis and Nitrogen Metabolism in Climbing Rose Under Salt Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年19
Page:
57-65
Research Field:
Publishing date:

Info

Title:
Regulation of Exogenous Ca2+Addition on the Activities of Enzymes Related to Photosynthesis and Nitrogen Metabolism in Climbing Rose Under Salt Stress
Author(s):
LI Jie1; ZHOU Kai2; HE Wenfeng3
(1.College of Landscape Architecture,Shangqiu University,Shangqiu，Henan 476000；2.College of Agronomy，Henan Agricultural University，Zhengzhou，Henan 450003；3.Henan Yuyi Seed Technology Development Co.Ltd.，Zhengzhou，Henan 450000)
Keywords:
salt; exogenous Ca2+; climbing rose; photosynthesis; nitrogen metabolism
PACS:
S 685.12
DOI:
10.11937/bfyy.20231107
Abstract:
Taking climbing rose ‘Parade’ as test material，the effects of different concentrations of exogenous calcium (0,5,10,20 mmol·L-1) on photosynthesis and nitrogen metabolism related enzyme activity in climbing roses were studied by spraying 0，200 mmol·L-1 salt solution onto the soils，in order to provide reference for exogenous Ca2+ to alleviate the damage of salt stress to climbing rose.The results showed that a certain concentration of exogenous Ca2+ could increase the height growth，leaf area，and aboveground biomass of climbing rose，promote photosynthesis，increase the content of photosynthetic pigments in leaves，and enhance the activity of nitrogen metabolism related enzymes to enhance plant resistance.Under 200 mmol·L-1 salt treatment，compared with 0 mmol·L-1 Ca2+ treatment concentration，adding 10 mmol·L-1 Ca2+ concentration increased the chlorophyll a，chlorophyll b，total chlorophyll (a+b)，and lutein content of climbing roses by 143.9%，152.5%，151.9% and 90.6%，respectively.The photosynthetic parameters of water use efficiency (WUE)，net photosynthetic rate (Pn)，transpiration rate (Tr)，intercellular CO2 concentration (Ci) and stomatal conductance (Gs) increased by 96.6%，60.5%，353.3%，43.0% and 80.6%，respectively.The Ls decreased by 63.8%，and the maximum photochemical efficiency (Fv/Fm) and potential activity (Fv/Fo) of PS Ⅱ significantly increased.In addition，under salt stress，the nitrate nitrogen content in the leaves of climbing rose decreased，while the ammonium nitrogen content increased.A certain concentration of exogenous Ca2+ treatment could significantly increase the activities of nitrate reductase (NR)，glutamine synthetase (GS) and isocitrate dehydrogenase (NADP-ICDH)，while reducing the activity of glutamine dehydrogenase (NADH-GDH).The conclusion was that adding a certain amount of Ca2+ could increase the photosynthetic pigments and nitrate nitrogen content of climbing rose，promoted the activity of related enzymes in nitrogen metabolism，improved plant photosynthesis，and further promote plant growth to resist salt stress.Among them，adding 10 mmol·L-1 Ca2+ treatment had the best effect.

References:

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Last Update: 2023-11-29