|Table of Contents|

Effect of Low Temperature Stress on Photosynthesis Physiology of Magnolia officinalis subsp.biloba(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年16
Page:
147-153
Research Field:
Publishing date:

Info

Title:
Effect of Low Temperature Stress on Photosynthesis Physiology of Magnolia officinalis subsp.biloba
Author(s):
CHEN Jiancheng1XU Wen1QI Xiaoyong1HE Tianyou2ZHENG Yushan1CHEN Liguang1
(1.College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002;2.College of Art & Landscape Architecture,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002)
Keywords:
Magnolia officinalislow temperature stresschlorophyllphotosynthesis and photosynthetic characteristicsphysiological index
PACS:
-
DOI:
10.11937/bfyy.20164937
Abstract:
The 2-year-old Magnolia officinalis was used as test material,the photosynthetic characteristics of -5,0,5,10,15,25 ℃(CK) were studied by artificial low temperature stress.The results showed that the net photosynthetic rate (Pn),stomatal conductance (Gs) and transpiration rate (Tr) decreased gradually with the decrease of stress temperature,the decrease of chlorophyll content.The highest photo-chemical efficiency (Fv/Fm),potential photo-chemical efficiency (Fv/Fo),apparent electron transport rate (ETR),photosynthetic quantum yield (Yield) and photo-chemical quenching coefficient (qP) of photosynthetic PSII showed a decreasing trend.Ci,malondialdehyde(MDA) content,cytoplasmic membrane permeability and non-photo-chemical quenching coefficient (NPQ) increased,then plasma membrane was the most serious damage at -5 ℃,a large number of ion percolated.Low temperature of chlorophyll significantly reduced,PSII reaction center damage,the leaves of Magnolia officinalis seedlings significantly inhibited light,resulting in reduced photosynthetic capacity.

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Last Update: 2017-08-31