|Table of Contents|

Effects of Low Temperature Stress on Photosynthetic Characteristics of Panax notoginseng

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年04
Page:
121-128
Research Field:
Publishing date:

Info

Title:
Effects of Low Temperature Stress on Photosynthetic Characteristics of Panax notoginseng
Author(s):
ZHENG Qiantong1; YANG Zaiqiang1; 2; WANG Mingtian3; XU Chao2; SUN Qing2; YANG Shiqiong1
(1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044;2 Jiangsu Key Laboratory of Agricultural Meteorology,Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044;3.Sichuan Meteorological Observatory,Chengdu,Sichuan 610000)
Keywords:
Panax notoginseng; low temperature stress; photosynthetic characteristics
PACS:
-
DOI:
10.11937/bfyy.20191793
Abstract:
In order to study the effects of low temperature and treatment time on photosynthetic characteristics of Panax notoginseng leaves,four treatments were set up under controlled environment.Night temperatures and daytime temperatures were 10 ℃/0 ℃(T1),13 ℃/3 ℃(T2),16 ℃/6 ℃(T3) and 19 ℃/9 ℃(T4),and for control group(CK),night temperature and daytime temperature were set as 28 ℃/18 ℃.The plants in each treatment were treated for 1,3,5,7 days,respectively.The effects of different treatments and treatment time on Panax notoginseng were determined systematically in order to provide support for the prevention of low temperature disasters of Panax notoginseng.The results showed that the photosynthesis of Panax notoginseng leaves was inhibited by low temperature stress.When the temperature getting lower,the maximum photosynthetic rate and light compensation point declined significantly,while the photosynthetic rate (Pn),stomatal conductance (Gs),transpiration rate (Tr),light compensation point (LCP) and light saturation point (LSP) decreased with the decline of temperature and the extension of treatment time.Intercellular carbon dioxide concentration (Ci) increased at first and then decreased with the prolonging of treatment time in T2 and T3 treatments.However,Ls and Ci showed opposite trend during treatments.WUE increased at first and then decreased in T1 treatments,and increased with the extension of treatment time in T2,T3 and T4 treatments.It was concluded that low temperature stress could inhibit photosynthesis of Panax notoginseng.

References:

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Last Update: 2020-03-30