Home > Archive>Volume 21, Issue 2, 2013 >123-129. DOI:10.3969/j.issn.1005-3395.2013.02.004
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Effect of Drought Stress on Photosynthetic Characteristics and Ultrastructure of Mesophyll Cells in Three Cultivars of Jaminum sambac
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Fujian Agriculture and Forestry University,Fujian Agriculture and Forestry University,Fujian Agriculture and Forestry University,Fujian Agriculture and Forestry University,Fujian Agriculture and Forestry University

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    Abstract:

    In order to understand the response of photosynthesis and ultrastructure of mesophyll cells to drought stress, three cultivars of Jaminum sambac, including ‘Unifoliatum', ‘Bifoliatum' and ‘Trifoliatum', were cultured in pots experiment in greenhouse under different drought treatments (mild drought, moderate drought, severe drought), The effects of drought stress on photosynthetic characteristics and ultrastructure of mesophyll cells in J. sambac were studied. The results showed that the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs) and intercellular CO2 concentration (Ci) in J. sambac ‘Unifoliatum' and ‘Trifoliatum' decreased under mild drought stress, and the ultrastructure of mesophyll cells was only slightly affected. Under moderate drought stress, Pn, Tr, Gs and Ci of ‘Unifoliatum' and ‘Trifoliatum' decreased continuously except Ci of ‘Trifoliatum' increased, while chloroplast structure changed obviously and occurred damage. Under severe drought stress, Pn, Tr and Gs of ‘Unifoliatum' and ‘Trifoliatum' had singnificant decrease compared to those of control (P<0.01), and Ci increased, while chloroplast structure changed tremendously and occurred serious damage. The Pn, Tr, Gs and Ci of ‘Bifoliatum' decreased slightly with increment of drought stress, and ultrastructure of mesophyll cells of ‘Bifoliatum' had not obvious changes. Therefore, the tolerance ability to drought of J. sambac ‘Bifoliatum' is stronger than that of ‘Unifoliatum' and ‘Trifoliatum'.

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郭素枝,张明辉,邓传远,那海燕,王湘平,叶乃兴.干旱胁迫对茉莉3个品种叶片光合特性和超微结构的影响[J].热带亚热带植物学报,2013,21(2):123~129

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History
  • Received:February 28,2012
  • Revised:June 02,2012
  • Adopted:October 08,2012
  • Online: April 03,2013
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