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Intraspecific differences in Cucumis sativus sensitivity to ultraviolet‐B radiation
Author(s) -
Murali N. S.,
Teramura Alan H.
Publication year - 1986
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1986.tb03416.x
Subject(s) - cucumis , intraspecific competition , ultraviolet b radiation , absorbance , dry weight , ultraviolet , botany , horticulture , chemistry , biology , ultraviolet radiation , zoology , radiochemistry , chromatography , ecology , physics , quantum mechanics
Cucumber ( Cucumis sativus L.) cultivars Marketmore, Lama, XPH 1187, XPH 1484 and Sprint 440 (N) were grown in a greenhouse under two levels of biologically effective ultraviolet‐B ( UV ‐B) radiation (daily dose: 0 and 11.6 kJ m −2 UV‐B BE ) for 31 days. Significant intraspecific differences were observed in plant height, number of leaves, leaf area and total dry weight. Based upon total biomass accumulation, Marketmore was found to be the most tolerant, and XPH 1484 the most sensitive to UV‐B radiation. The dose response of accumulation of UV absorbing compounds (measured as absorbance of methanolic extracts) in leaf tissues showed an increase in UV absorbing compounds with UV‐B dose in Marketmore, Sprint 440 (N) and XPH 1187. In Lama and XPH 1484, however, doses below 8.7 kJ m −2 UV‐B BE produced no change in UV absorbing compounds. This study suggests that intraspecific differences in UV‐B radiation sensitivity in cucumber may be related to inherent differences in the accumulation of UV absorbing compounds in leaves.