Photosynthetica 2007, 45(4):503-509 | DOI: 10.1007/s11099-007-0087-0

Photosynthetic response to water stress and changes in metabolites in Jasminum sambac

H. Cai1,2, D. K. Biswas3, A. Q. Shang4, L. J. Zhao1,*, W. D. Li3,4,*
1 Department of Ornamental Horticulture and Landscape Architecture, China Agricultural University, Beijing, P. R. China
2 College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
3 Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, P. R. China
4 College of Horticulture, Hebei Agricultural University, Baoding, P. R. China

Gas exchange, chlorophyll (Chl) fluorescence, and contents of some metabolites in two genotypes of jasmine (Jasminum sambac), single petal (SP) and double petal (DP) one, were analyzed during dehydration and re-hydration. Water stress significantly decreased net photosynthetic rate, stomatal conductance, and maximum photochemical efficiency (Fv/Fm) in both jasmine genotypes, but increased minimum fluorescence (F0) only in DP-jasmine. Water stress also decreased starch content, while increased contents of total soluble sugars and proline in leaves of both genotypes. SP-jasmine demonstrated higher drought tolerance as evidenced by maintaining higher gas exchange and photochemical efficiency and lower alteration of metabolites than DP-jasmine. Recovery analysis revealed that drought-induced injury in photosynthetic machinery in jasmine plants was reversible. DP-jasmine exhibited a slow recovery of drought-induced impairment in photosynthetic activity and associated metabolites, suggesting that this genotype had lower capacity to adapt to water limited condition. Higher yield stability of SP-than that of DP-jasmine under rain-fed condition finally confirmed higher drought tolerance of SP-jasmine.

Additional key words: chlorophyll fluorescence; gas exchange; proline; starch; total soluble sugars; yield

Received: January 15, 2007; Accepted: March 26, 2007; Published: December 1, 2007  Show citation

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Cai, H., Biswas, D.K., Shang, A.Q., Zhao, L.J., & Li, W.D. (2007). Photosynthetic response to water stress and changes in metabolites in Jasminum sambac. Photosynthetica, 45(4), 503-509. doi: 10.1007/s11099-007-0087-0
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