|Table of Contents|

Effects of Two Kinds of Salt Stress on Photosynthetic Characteristics of Melia azedaeach L. Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年20
Page:
75-81
Research Field:
Publishing date:

Info

Title:
Effects of Two Kinds of Salt Stress on Photosynthetic Characteristics of Melia azedaeach L. Seedlings
Author(s):
WU Xiaohong; HU Xin; WANG Guibin; CAO Fuliang; YU Wanwen
(Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry Univesity,Nanjing,Jiangsu 210037)
Keywords:
Melia azedaeach L.; Na2SO4; Na2CO3; photosynthetic characteristics; chlorophyll fluorescence; correlation
PACS:
-
DOI:
10.11937/bfyy.20190697
Abstract:
One-year-old seedlings of Melia azedaeach L.were selected as test materials and planted in pots in greenhouses.The seedlings were treated with Na2SO4 and Na2CO3 at concentrations of 0%(CK)，0.2%，0.4% and 0.6% for 21 days，and the changes and differences of photosynthesis and chlorophyll fluorescence parameters of seedlings under salt stress were compared.The results showed that there was no significant difference between Pn，Tr，Ci，Fv/Fm，Fv/Fo，qP and NPQ at 0.2% salt concentration，and the difference was significant at 0.6% salt concentration.At the same time，salt treatment with different concentrations had no significant effect on Chl a，Chl b，Chl(a+b)，Chl a/b，Fo and Fm.The study found that the chlorophyll content of seedlings had no significant effect under the two kinds of salt treatments;Na2CO3 stress caused a decrease in Pn by non-stomatal restriction，and the decrease of Pn caused by 0.2% Na2SO4 was stomatal limitation，and non-stomatal limitation under 0.4% and 0.6% treatment.The seedling photosynthesis and photosynthetic apparatus were more resistant under 0.2% stress.The tolerance was weak under 0.6% stress.At the same time，the effect of alkaline salt Na2CO3 stress on photosynthesis of Melia azedaeach L.was larger than that of neutral salt Na2SO4.

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Last Update: 2019-10-30