Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species

It is, so far, unclear whether lianas and trees differ in photosynthetic thermotolerance and response to high temperature and high light. Here, photosynthetic thermotolerance was compared in the leaves of Bauhinia brachycarpa (tree) and Bauhinia comosa (liana). Moreover, the combined treatments of f...

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Main Authors: S.B. ZHANG, Q.L. DENG, Y.J. HAO
Format: Article
Language:English
Published: Academy of Sciences of the Czech Republic, Institute of Experimental Botany 2019-11-01
Series:Photosynthetica
Subjects:
Online Access:https://ps.ueb.cas.cz/artkey/phs-201904-0020_effects-of-high-temperature-and-high-light-on-photosystem-ii-activity-in-leaves-of-two-bauhinia-species.php
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author S.B. ZHANG
Q.L. DENG
Y.J. HAO
author_facet S.B. ZHANG
Q.L. DENG
Y.J. HAO
author_sort S.B. ZHANG
collection DOAJ
description It is, so far, unclear whether lianas and trees differ in photosynthetic thermotolerance and response to high temperature and high light. Here, photosynthetic thermotolerance was compared in the leaves of Bauhinia brachycarpa (tree) and Bauhinia comosa (liana). Moreover, the combined treatments of four temperatures (25, 35, 40, and 45°C) and two light intensities [500 and 2,000 μmol(photon) m-2 s-1] were used to investigate the effects of high temperature and high light on PSII activity. The results showed that B. brachycarpa leaves exhibited higher photosynthetic thermotolerance, leaf mass per area, and Ca2+ concentration than those of B. comosa. As the temperature and light intensity increased, maximum quantum yield of PSII decreased significantly, particularly with greater declines in B. comosa than that in B. brachycarpa. Our results suggested that PSII was more sensitive to high temperature and high light in liana species B. comosa than in the congener tree species B. brachycarpa.
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spelling doaj.art-539f4d223f43401bb639c652bad492c62022-12-22T00:04:44ZengAcademy of Sciences of the Czech Republic, Institute of Experimental BotanyPhotosynthetica0300-36041573-90582019-11-015741094109910.32615/ps.2019.128phs-201904-0020Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia speciesS.B. ZHANG0Q.L. DENG1Y.J. HAO2CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666303 Yunnan, ChinaSchool of Geography and Eco-tourism, Southwest Forestry University, 650224 Kunming, Yunnan, ChinaSchool of Ecology and Environment Conservation, Southwest Forestry University, Kunming, 650224 Yunnan, ChinaIt is, so far, unclear whether lianas and trees differ in photosynthetic thermotolerance and response to high temperature and high light. Here, photosynthetic thermotolerance was compared in the leaves of Bauhinia brachycarpa (tree) and Bauhinia comosa (liana). Moreover, the combined treatments of four temperatures (25, 35, 40, and 45°C) and two light intensities [500 and 2,000 μmol(photon) m-2 s-1] were used to investigate the effects of high temperature and high light on PSII activity. The results showed that B. brachycarpa leaves exhibited higher photosynthetic thermotolerance, leaf mass per area, and Ca2+ concentration than those of B. comosa. As the temperature and light intensity increased, maximum quantum yield of PSII decreased significantly, particularly with greater declines in B. comosa than that in B. brachycarpa. Our results suggested that PSII was more sensitive to high temperature and high light in liana species B. comosa than in the congener tree species B. brachycarpa.https://ps.ueb.cas.cz/artkey/phs-201904-0020_effects-of-high-temperature-and-high-light-on-photosystem-ii-activity-in-leaves-of-two-bauhinia-species.phpglobal warming; heat stress; photoinhibition; photoprotection.
spellingShingle S.B. ZHANG
Q.L. DENG
Y.J. HAO
Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species
Photosynthetica
global warming; heat stress; photoinhibition; photoprotection.
title Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species
title_full Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species
title_fullStr Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species
title_full_unstemmed Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species
title_short Effects of high temperature and high light on photosystem II activity in leaves of two Bauhinia species
title_sort effects of high temperature and high light on photosystem ii activity in leaves of two bauhinia species
topic global warming; heat stress; photoinhibition; photoprotection.
url https://ps.ueb.cas.cz/artkey/phs-201904-0020_effects-of-high-temperature-and-high-light-on-photosystem-ii-activity-in-leaves-of-two-bauhinia-species.php
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