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DIFFERENTIAL SENSITIVITY OF FOUR HIGHBUSH BLUEBERRY (VACCINIUM CORYMBOSUM L.) CULTIVARS TO HEAT STRESS

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dc.contributor.author CHEN, WENRONG
dc.contributor.author WEIYA CEN, LI CHEN
dc.contributor.author DI, LULU
dc.contributor.author LI, YONGQIANG
dc.contributor.author GUO, WEIDONG
dc.date.accessioned 2022-12-19T10:36:49Z
dc.date.available 2022-12-19T10:36:49Z
dc.date.issued 2012-06-02
dc.identifier.citation Chen, W. E. N. R. O. N. G., Cen, W. E. I. Y. A., Chen, L., Di, L., Li, Y., & Guo, W. (2012). Differential sensitivity of four highbush blueberry (Vaccinium corymbosum L.) cultivars to heat stress. Pak. J. Bot, 44(3), 853-860. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/15300
dc.description.abstract Highbush blueberry (Vaccinium corymbosum L.) has recently been introduced into Southeast China, a typical subtropical area with a high temperature climate in summer. Understanding of the thermal tolerance among different genotypes of highbush blueberry is needed to select appropriate cultivars. Four highbush blueberry cultivars (‘Duck’, ‘Brigitta’, ‘Sharpblue’ and ‘Misty’) were exposed for 6 h to different temperatures (25, 30, 35, 40 and 45°C), and then various physiological parameters and ultrastructure of chloroplast were assessed. Exposure to high temperature significantly increased the level of relative electrolyte leakage (REL), contents of malondialdehyde (MDA), proline content, hydrogen peroxide (H2O2), superoxide radical (O2. -) rate, and the initial chlorophyll fluorescence yield (Fo). Whereas the maximum photochemical efficiency of PSII (Fv/Fm) and the quantum efficiency of PSII photochemistry (ФPS II) decreased under high temperature conditions. The most pronounced effect by high temperature stress was obtained in ‘Brigitta’, while the least effect existed in ‘Sharpblue’. Furthermore, the chloroplast ultrastructure in ‘Brigitta’ was severely damaged under heat temperature stress, whereas that of ‘Sharpblue’ was almost intact. The results indicated that the ‘Sharpblue’ was the most heat-tolerant blueberry cultivar while ‘Brigitta’ was the most sensitive to heat temperature stress, followed by ‘Duck’ and ‘Misty’. These were consistent with results observed from the field trial. This study proved that photosynthetic parameters stressed by short-term heat stress were fairly reliable to evaluate the thermal endurance in highbush blueberry. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society en_US
dc.title DIFFERENTIAL SENSITIVITY OF FOUR HIGHBUSH BLUEBERRY (VACCINIUM CORYMBOSUM L.) CULTIVARS TO HEAT STRESS en_US
dc.type Article en_US


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