|Table of Contents|

Effect of High Temperature Stress on Photosynthetic Characteristics and  Fruit Quality of Greenhouse Cucumber Leaves in Flowering Stage(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年06
Page:
1-7
Research Field:
Publishing date:

Info

Title:
Effect of High Temperature Stress on Photosynthetic Characteristics and  Fruit Quality of Greenhouse Cucumber Leaves in Flowering Stage
Author(s):
XUE Sijia1; YANG Zaiqiang1; LI 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:
high temperature; cucumber; photosynthesis; fruit quality
PACS:
-
DOI:
10.11937/bfyy.201706001
Abstract:
In order to study the effects of high temperature stress on the photosynthetic characteristics and fruit quality of greenhouse cucumber crops at flowering stage,artificial environment control tests were conducted to the ‘Nan Za Ⅱ’,which was chosen as the plant material in Nanjing University of Information Science and Technology from 2014 to 2015.Three high temperature treatments were designed,36 ℃(day)/18 ℃(night),39 ℃/18 ℃,42 ℃/18 ℃,for dealing with 1 day,3 days,5 days,7 days respectively,with 25 ℃(day)/18 ℃(night) as controls(CK).The results showed that the light saturation point,the maximum photosynthetic rate and the apparent quantum efficiency in leaves were the highest under 42 ℃/18 ℃ treatment for 7 days than that of CK reduced 59.6%,72.5%,70.1%,respectively,the light compensation point of leaves under 42 ℃/18 ℃ for 7 days showed the opposite trend.The fruit weight,the minimum fruit diameter,the maximum fruit diameter and the moisture content of cucumber decreased with the increase of high temperature stress,and the fruit external quality became the worst under 39 ℃/18 ℃ for 7 days,and compared with CK,reduced 24.2%,20.9%,32.4%,1.4%,respectively.Under different high temperature stress at flowering stage,the vitamin C content of fruit decreased with the increase of high temperature stress.The vitamin C content of fruit under 39 ℃/18 ℃ for 7 days with the normal temperature treatment reduced 11.3%.The soluble sugar content of fruit with the increase of high temperature stress presented a trend of increasing first and then decreasing.On the first day the soluble protein content of fruit increased with the increase of the temperature,the fifth and seventh day showed the opposite trend.The study suggested that the high temperature stress at flowering stage reduced the photosynthetic performance of leaves,and the reducing amplitude increased with the extension of stress time.High temperature stress at flowering stage made fruit thinner,lighter and reduced the moisture content.Soluble sugar content of fruit increased under mild high temperature stress,and the soluble sugar content of fruit decreased with the increase of the temperature.The short-term high temperature stress at flowering stage increased the soluble protein content,soluble protein content decreased with the increase of the stress time.

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Last Update: 2017-04-01