|Table of Contents|

Effects of Low Light on Photosynthetic Characteristics of Chrysanthemum morifolium Cultivar ‘Puma sunny’(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年06
Page:
81-85
Research Field:
Publishing date:

Info

Title:
Effects of Low Light on Photosynthetic Characteristics of Chrysanthemum morifolium Cultivar ‘Puma sunny’
Author(s):
HAN Shuang
(Department of Life Science,Shangqiu Normal University/Key Laboratory of Plant-microbe Interactions,Shangqiu,Henan 476000)
Keywords:
low light; photosynthetic characteristics; sensitivity; response curve
PACS:
-
DOI:
10.11937/bfyy.201706019
Abstract:
In order to study the effects of weak light on the chrysanthemum photosynthetic characteristic,in order to improve the seeding stage management.Chrysanthemum morifolium‘Puma sunny’ was used for experiment materials,natural light (CK) and 30% light (low light) two conditions were set,LI-6400 portable photosynthetic apparatus were used to measure photosynthetic parameters in 0 days,5 days,10 days,15 days,20 days and the photosynthetic response curves were obtained under 1 500,1 200,1 000,800,600,400,200,150,100,50,200 μmol?m-2?s-1 of different light.The results showed that with the increasing of PAR,the net photosynthetic rate showed an upward trend,and the same was true in the light of the weak light conditions.Under the condition of weak light 〖JP〗treatment,the photosynthetic rate was lower than that of natural light;net photosynthetic rate Pn,the control group reached maximum 15.31 CO2 μmol?m-2?s-1,while the low-light only reached the maximum 7.94 CO2 μmol?m-2?s-1;light saturation point (LSP) maximum were 1 061.00 μmol?m-2?s-1,825.00 μmol?m-2?s-1;light compensation point (LCP) maximum respectively 58.7 μmol?m-2?s-1,76.42 μmol?m-2?s-1.The gas exchange parameters were analyzed,and the plants were found to moderate the decline of the photosynthetic rate resulted from the lack of light,by increasing the stomatal opening and decreasing the intercellular carbon dioxide concentration;under the low light,although the chrysanthemum try to adapt to the environment changed by its own adjustment,the low light would still cause the decline of its photosynthetic rate,and affect the normal growth of the plant.This effect was not only related to the stomatal limitation,but also affected by the non-stomatal factors.

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Last Update: 2017-04-01