|Table of Contents|

Primary Study on Photosynthesis of Zizyphus jujuba Mill.cv.Lingwuchangzao(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年11期
Page:
11-14
Research Field:
Publishing date:

Info

Title:
Primary Study on Photosynthesis of Zizyphus jujuba Mill.cv.Lingwuchangzao
Author(s):
CAO Bing1JIANG Li1LI Yin-di1SUN Yong-sheng2SU Wei-dong3
1.College of Agriculture,Ningxia University,Yinchuan,Ningxia 750021;
2.Lingwu Forestry Bureau,Lingwu,Ningxia 751400;
3.Lingwu Fruit Industry Development Limited Liability Company,Lingwu,Ningxia 751400
Keywords:
Zizyphus jujuba Mill.cv. Lingwuchangzaophotosynthesis variationnet photosynthetic ratewater utilization efficiency
PACS:
S 665.1
DOI:
-
Abstract:
Selected seven-year-old individuals (young individual) and twelve-year-old individuals (mature individual) in Lingwuchangzao as materials,used automatic photosynthesis test instrument(CARIS-1),the photosynthesis of young individual and mature individual at different months during whole growing season were determined,the seasonal variation of photosynthesis in Zizyphus jujuba Mill.cv.Lingwuchangzao were studied.The results showed that the photosynthesis in the jujube showed significant month variations,and the photosynthesis characteristics of young individual and mature individual were different.The variation trend of net photosynthesis rate of the mature individual during growing season was a unimodal curve in which the peak of Pn occurred at Aug.that was 12 μmol?m-2?s-1,but the variation trend of Pn of the young individual during growing season was a bimodal curve in which the peaks of Pn occurred at June and Aug.that was 7.8 μmol?m-2?s-1 and 13.9 μmol?m-2?s-1 respectively.The variation trends of stomatal conductance (Gs) and transpiration rate (Tr) were same as the variation of Pn during different months,but the value of Gs and Tr of young individuals were greater than that of mature individuals.There was no big different of the variation trends of water utilization efficiency (WUE) between young and mature individuals,and the peak value of WUE occurred at May while minimum value occurred at June,and then the value of WUE increased slowly,but reduced before leaf falling.The intercellular CO2 concentration (Ci)value of young and mature individuals during May and Sept.was from 150~250 μmol/mol,but the Ci increased before the leaf falling.It could be concluded that the photosynthesis peak of Lingwuchangzao was occurred at June and Aug.And the photosynthetic capacity of young individuals in Lingwuchangzao was stronger than that of mature jujube.

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Last Update: 2014-09-24