|Table of Contents|

Effects of Exogenous Citric Acid on Diurnal Change of Photosynthesis in Pomegranate

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年19
Page:
39-44
Research Field:
Publishing date:

Info

Title:
Effects of Exogenous Citric Acid on Diurnal Change of Photosynthesis in Pomegranate
Author(s):
FENG Lijuan1; YANG Xuemei1; TANG Haixia1; JIAO Qiqing1; CUI Hongtao2; YIN Yanlei1
(1.Shandong Institute of Pomology，Tai′an，Shandong 271000；2.Tai′an Landscape Administration Bureau，Tai′an,Shandong 271000)
Keywords:
Punica granatum; citric acid; photosynthesis; diurnal changes
PACS:
-
DOI:
10.11937/bfyy.20190033
Abstract:
The effect of exogenous citric acid on diurnal change of photosynthesis was studied in pomegranate cultivar ‘Taishanhong’ by CIRAS-3 portable photosynthesis system.It could provide a theoretical basis for the cultivation regulation of pomegranate production.The results showed that the air temperature and photosynthetic active radiation increased first and then decreased with the time increased，which peak value appeared at 14:00 and 12:00，respectively.Under the control and different concentrations of citric acid treatment，the diurnal variation trend of net photosynthetic rate，stomatal conductance and transpiration rate of pomegranate leaves showed a typical double-peak curve.The intercellular CO2 concentration and water use efficiency decreased first and then increased.The change trend of vapour pressure deficit first increased，then decreased and increased.The reduction of photosynthetic capacity was affected by the stomatal and non-stomatal factors in pomegranate.Compared with the control，citric acid treatment significantly improved the net photosynthetic rate，stomatal conductance，transpiration rate，intercellular CO2 concentration，water use efficiency and vapor pressure deficit of pomegranate leaves，and the best treatment was 0.2% citric acid.The net photosynthetic rate was closely related with air temperature，photosynthetic active radiation，stomatal conductance and transpiration rate，and significantly negative related with intercellular CO2 concentration.Water use efficiency was positively correlated with intercellular CO2 concentration and vapor pressure deficit.

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Last Update: 2019-10-09