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Tytuł pozycji:

Response of Zebrina pendula leaves to enhanced UV-B radiation.

Tytuł:
Response of Zebrina pendula leaves to enhanced UV-B radiation.
Autorzy:
Wang D; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
Sun Y; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
Tu M; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
Zhang P; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
Wang X; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
Wang T; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China; and Engineering Technology Research Center of Nursing and Utilisation of Genuine Chinese Crude Drugs in Henan Province, Xinxiang, Henan 453007, China; and Corresponding author. Email: .
Li J; College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China; and Engineering Technology Research Center of Nursing and Utilisation of Genuine Chinese Crude Drugs in Henan Province, Xinxiang, Henan 453007, China; and Corresponding author. Email: .
Źródło:
Functional plant biology : FPB [Funct Plant Biol] 2021 Aug; Vol. 48 (9), pp. 851-859.
Typ publikacji:
Journal Article; Research Support, Non-U.S. Gov't
Język:
English
Imprint Name(s):
Original Publication: Collingwood, VIC, Australia : CSIRO Pub., c2002-
MeSH Terms:
Plant Leaves*
Ultraviolet Rays*/adverse effects
Biomass ; Photosynthesis ; Sunlight
Entry Date(s):
Date Created: 20210503 Date Completed: 20210817 Latest Revision: 20210817
Update Code:
20240105
DOI:
10.1071/FP20274
PMID:
33934745
Czasopismo naukowe
Plants inevitably receive harmful UV-B radiation when exposed to solar energy, so they have developed a variety of strategies to protect against UV-B radiation damage during long-term evolution. In this study, Zebrina pendulaSchnizl. was used to investigate the plant defence against UV-B radiation because of its strong adaptability to sunlight changes, and the colour of its leaves changes significantly under different sunlight intensities. The experiment was carried out to study the changes of Z. pendula leaves under three light conditions: artificial daylight (control check); shading 50%; and artificial daylight + UV-B, aiming to explore the mechanism of defence against UV-B radiation by observing changes in leaf morphological structure, anthocyanin content and distribution. Results showed that the single leaf area increased but leaves became thinner, and the anthocyanin content in the epidermal cells decreased under 50% shading. In contrast, under daylight + UV-B, the single leaf area decreased but thickness increased (mainly due to the increase of the thickness of the upper epidermis and the palisade tissue), the trichomes increased. In addition, the anthocyanin content in the epidermal cells and phenylalanine ammonia-lyase (PAL) activity increased, and the leaf colour became redder, also, the photosynthetic pigment content in mesophyll cells and the biomass per unit volume increased significantly under daylight + UV-B. Thus, when UV-B radiation was enhanced, Z. pendula leaves reduced the exposure to UV-B radiation by reducing the area, and reflect some UV-B radiation by growing trichomes. The UV-B transmittance was effectively reduced by increasing the single leaf thickness and anthocyanin content to block or absorb partial UV-B. Through the above comprehensive defence strategies, Z. pendula effectively avoided the damage of UV-B radiation to mesophyll tissue.

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