|Table of Contents|

Effect of Low Temperature and Low Irradiation Stress on Senescence of Greenhouse Tomato During Flowering Period(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年05
Page:
49-55
Research Field:
Publishing date:

Info

Title:
Effect of Low Temperature and Low Irradiation Stress on Senescence of Greenhouse Tomato During Flowering Period
Author(s):
GAO Guan1ZOU Yujia1YANG Zaiqiang1LI Jun2
(1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing,Jiangsu 210044;2.Shanghai Climate Center,Shanghai 200030)
Keywords:
low temperature and low irradiationLycopersicon eseulentumsenescenceprincipal component analysis
PACS:
-
DOI:
10.11937/bfyy.201605014
Abstract:
Taking ‘Jinfen 5’ as experiment material,the artificial environment control of low temperature and low irradiation was conducted in Nanjing University of Information Science and Technology from February to May in 2015.The daily/night temperature was treated as four levels,18/8℃,16/6℃,14/4℃ and 12/2℃,photosynthetically active radiation(PAR) was set two levels,400 μmol?m-2?s-1 and 200 μmol?m-2?s-1,and took daily/night temperature 28/18℃ and PAR 1 000 μmol?m-2?s-1 as CK,chlorophyll a content,chlorophyll b content,chlorophyll a/b,SOD,POD,CAT activities,MDA content and relative conductivity were studied,to judge the effects of low temperature and low irradiation stress to the senescence of greenhouse tomato leaves.The results showed that with treat time extension,Chl a content,Chl b content and Chl a/b of tomato leaves were declined.The experiment lasted for 10 days at the case of daily/night temperature was 12/2℃,PAR was 200 μmol?m-2?s-1,Chl a content and Chl b content was the least,which decreased 3631%,3611% respectively compared with the CK;moreover SOD,POD,CAT activities,MDA content and relative conductivity of tomato leaves was increased in varying extents with treat time extension.And the experiment lasted for 10 days at the case of daily/night temperature was 12/2℃,PAR was 200 μmol?m-2?s-1,every index of tomato leaves always were in higher level than other treatments,they increased 209,382,370,249 and 175 times respectively compared with the CK.By calculating index of each treatment with principal component analysis and ranking the severity that damaged the tomato,it showed that when at the same low irradiation level,the lower the temperature,or at the same low temperature level,the lower the PAR,the greater damage degree of tomato photosystem were caused.The study could provide scientific theory basis for defense of low temperature and low irradiation disaster in facility tomato.

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Last Update: 2016-04-26