|Table of Contents|

Study on Photosynthetic Characteristics and the Daily Variation of Coupling Mechanism Photosynthesis and Transpiration of Three Kinds of Malus Plant(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年08
Page:
24-29
Research Field:
Publishing date:

Info

Title:
Study on Photosynthetic Characteristics and the Daily Variation of Coupling Mechanism Photosynthesis and Transpiration of Three Kinds of Malus Plant
Author(s):
YANG Geng-qiang1 2YAN Cheng1CHEN Jun-ji1 2XIN Hui-hui3HE Peng4
(1.Key Laboratory of Biogeography and Bioresource in Arid Land,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,Xinjiang 830011;2.University of Chinese Academy of Sciences,Beijing 100049;3.Shihezi University,Shihezi,Xinjiang 832000;4.Wuyi Farm,Agricultural Division 12,Xinjiang Production and Construction Corps,Urumqi,Xinjiang 830088)
Keywords:
photosynthesistranspirationstomatal conductancePARcarbon cycling
PACS:
S 685.99
DOI:
10.11937/bfyy.201508006
Abstract:
With 3-year old seedling malus of ‘Baimei Haitang’,‘Hongye Haitang’ and ‘Zhili pingguo’ in Wuyi farm as materials,a comprehensive analysis of the coupling relationship between photosynthesis and transpiration,daily variations of photosynthesis rate (An) and transpiration (Tr) were measured by portable photosynthesis system (LC,Pro) in sunny days.The results showed that,during daily variation,account for solar altitude,PAR,Tl,Gs showed similar daily variations,Ci behaved in an opposite way,those variations ultimately results in the linear coupling of photosynthesis and transpiration.Peak of those parameters occurred at different time of the three plants.Except Gs of ‘Baimei Haitang’,others parameters appeared a significantly linearly with each other in each plant.An and Tr showed similar daily trend,Er was significantly linearly positive correlated with an proved a significantly coupling relationship in these three kind of plants.But WUE(water use efficiency) of them was different:‘Zhili Pingguo’>‘Hongye Haitang’>‘Baimei Haitang’.An and Tr showed a significantly linearly with other parameters,path analysis identified that Ci had the greatest effect on An,TI had least influence on An.Tl had greater effect on Tr than that of Gs,all of these factors interaction each other to conduct metabolism of plants together.Analysis got the conclusions base on correlate analysis and path analysis as follow,PAR increased as light increase,resulted in the increase of an stomatal conductance,Tr and decrease of intercellular CO2 concentration.Photosynthesis process was achieved by CO2 and H2O in the air which participate in through stomata.Light increased lead to the increase of leaf temperature and vapor presser deficit,resulted in the increase of Tr.

References:


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Last Update: 2015-07-22