Studies on the Thermotolerance in Six Ornamental Fruit Plants

doi:10.11924/j.issn.1000-6850.casb15010025

Abstract

Abstract: In order to select suitable ornamental fruit plants growing in northern summer, increase the kinds of ornamental fruit plants and enrich plant landscape in northern China, six ornamental fruit plants in different native habitats were determined the semi-lethal temperature (LT50) by electric conductivity method combined with Logistic equation. Their morphological changes were observed in the field during summer and under high temperature stress respectively. The results indicated that with the rise of treated temperature, the rate of injured cells from the leaf segments of six ornamental fruit plants was increased with trend of ‘slow-fast-slow’, the relationship between the treatment of temperature for leaf species and the rate of injured cells varied in a ‘S’ curve model. The LT50 of the tested ornamental fruit plants in descending order was Lonicera korolkowii(62.31℃), Pyracantha coccinea (61.67℃), Callicarpa bodinieri (61.10℃), Clerodendrum trichotomum (57.12℃), Tetradium ruticarpum (57.10℃), Ribes burejense (53.23℃), which was similar to the morphological observation, LT50 could be used as their thermotolerance evaluation index.

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