caa a22 4500 605481075 CHVBK 20210128100419.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11099-015-0089-2 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0089-2 Heliotropic leaf movement of Sophora alopecuroides L.: An efficient strategy to optimise photochemical performance [Elektronische Daten] [C. Zhu, Y. Chen, W. Li, X. Chen, G. He] We studied the survival adaptation strategy of Sophora alopecuroides L. to habitat conditions in an arid desert riparian ecosystem. We examined the responses of heliotropic leaf movement to light conditions and their effects on plant photochemical performance. S. alopecuroides leaves did not show any observable nyctinastic movement but they presented sensitive diaheliotropic and paraheliotropic leaf movement in the forenoon and at midday. Solar radiation was a major factor inducing leaf movement, in addition, air temperature and vapour pressure deficit could also influence the heliotropic leaf movement in the afternoon. Both diaheliotropic leaf movement in the forenoon and paraheliotropic leaf movement at midday could help maintain higher photochemical efficiency and capability of light utilisation than fixed leaves. Paraheliotropic leaf movement at midday helped plants maintain a potentially higher photosynthetic capability and relieve a risk of photoinhibition. Our findings indicated the effective adaptation strategy of S. alopecuroides to high light, high temperature, and dry conditions in arid regions. This strategy can optimise the leaf energy balance and photochemical performance and ensure photosystem II function. The Institute of Experimental Botany, 2015 electron transport rate nationallicence energy dissipation nationallicence leaf tilt angle nationallicence nonphotochemical quenching nationallicence petiole angle nationallicence photosynthesis nationallicence quantum yield nationallicence trichome nationallicence D : fraction of energy lost by thermal dissipation nationallicence ETR : electron transport rate nationallicence F0 : minimum fluorescence yield of the dark-adapted state nationallicence F0′ : minimum fluorescence yield of the light-adapted state nationallicence Fm : maximum fluorescence yield of the dark-adapted state nationallicence Fm′ : maximum fluorescence yield of the light-adapted state nationallicence Fs : steady-state fluorescence nationallicence NPQ : nonphotochemical quenching nationallicence P : fraction of energy allocated to PSII photochemistry nationallicence qP : photochemical quenching nationallicence SEM : scanning electron microscopy nationallicence VPD : vapor pressure deficit nationallicence X : excess excitation energy nationallicence ΦPSII : effective quantum yield of PSII in light-adapted leaves nationallicence Zhu C. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, Xinjiang, China aut Chen Y. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, Xinjiang, China aut Li W. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, Xinjiang, China aut Chen X. Xinjiang Agricultural University, 830052, Urumqi, Xinjiang, China aut He G. Xinjiang Agricultural University, 830052, Urumqi, Xinjiang, China aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/2(2015-06-01), 231-240 0300-3604 53:2<231 2015 53 11099 https://doi.org/10.1007/s11099-015-0089-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11099-015-0089-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhu C. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- Chen Y. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- Li W. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- Chen X. Xinjiang Agricultural University, 830052, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- He G. Xinjiang Agricultural University, 830052, Urumqi, Xinjiang, China aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/2(2015-06-01), 231-240 0300-3604 53:2<231 2015 53 11099