Leaf movement and photosynthetic plasticity of black lokust (Robinia pseudoacacia) alleviate stress under different light and water conditions

• Autorzy: Xu F. , Guo W. , Wang R. , Xu W. , Du N. , Wang Y.
• Języki publikacji: EN

Abstrakty

EN

Leaf morphological, physiological and biochemical characteristics of Robinia pseudoacacia L. seedlings were studied under different stress conditions. The plants were subjected to drought and shade stress for one month. Leaf inclination, chlorophyll fluorescence and chlorophyll content were measured at the first day (shortterm stress) and at the end of the stress period (long-term stress) and in the recovery period. Leaf inclination was affected mainly by light; a low level of irradiance caused leaves to be arranged horizontally. Diurnal rhythmicity was lost after the long-term stress, but resumed, in part, in the recovery period. Drought stress caused leaves to tilt more obviously and decreased damage to the photosystem. Sun avoiding movement in a single leaf and sun tracking movement in the whole plant coexisted. Significant physiological changes occurred under different conditions of light. Increased energy dissipation and light capture were the main responses to high and low level of irradiance, respectively, and these were reflected by changes of chlorophyll fluorescence and chlorophyll content. Phenotypic plasticity in the leaflet enhanced the protective response to stress. These adaptive mechanisms may explain better survival of R. pseudoacacia seedlings in the understory, especially during the drought periods, and made it to be the preponderant reforestation species in Shandong Province of China.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2009
• Tom: 31
• Numer: 3
• Opis fizyczny: p.553-563,fig.,ref.

Twórcy

autor

Xu F.

• Institute of Ecology and Biodiversity, College of Life Sciences. Shandong University, 250100 Jinan, People's Republic of China

autor

Guo W.

• Institute of Ecology and Biodiversity, College of Life Sciences. Shandong University, 250100 Jinan, People's Republic of China

autor

Wang R.

• Institute of Ecology and Biodiversity, College of Life Sciences. Shandong University, 250100 Jinan, People's Republic of China

autor

Xu W.

• Institute of Ecology and Biodiversity, College of Life Sciences. Shandong University, 250100 Jinan, People's Republic of China

autor

Du N.

• Institute of Ecology and Biodiversity, College of Life Sciences. Shandong University, 250100 Jinan, People's Republic of China

autor

Wang Y.

• Institute of Ecology and Biodiversity, College of Life Sciences. Shandong University, 250100 Jinan, People's Republic of China

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