干旱区生态环境知识资源中心(Arid): Photoprotection and high-light acclimation in semi-arid grassland lichens - a cooperation between algal and fungal partners

Arid

DOI	10.1007/s13199-021-00823-y
	Photoprotection and high-light acclimation in semi-arid grassland lichens - a cooperation between algal and fungal partners
	Veres, Katalin; Csintalan, Zsolt; Laufer, Zsanett; Engel, Rita; Szabo, Krisztina; Farkas, Edit
通讯作者	Veres, K (corresponding author), Inst Ecol & Bot, Ctr Ecol Res, Alkotmany U 2-4, H-2163 Vacratot, Hungary.
来源期刊	SYMBIOSIS
ISSN	0334-5114
EISSN	1878-7665
出版年	2021-12
英文摘要	In lichens, each symbiotic partner cooperates for the survival of the symbiotic association. The protection of the susceptible photosynthetic apparatus is essential for both participants. The mycobiont and photobiont contribute to the protection against the damaging effect of excess light by various mechanisms. The present study investigated the effect of seasonality and microhabitat exposure on photoprotection and photoacclimation in the photo- and the mycobiont of six lichen species with different thallus morphology in inland dune system in the Kiskunsag region (Hungary) with shaded, more humid and exposed, drier dune sides. High-Performance Liquid Chromatography, spectrophotometry, chlorophyll a fluorescence kinetic technique were used, and micrometeorological data were collected. The four years data series revealed that the north-east-facing side was characterized by higher relative humidity and lower light intensities compared to the south-west-facing drier and more exposed sides. The south-west facing side was exposed to direct illumination 3-4 hours longer in winter and 1-2 hours shorter in summer than the north-east facing side of the dune, influencing the metabolism of sun and shade populations of various species. Because rapid desiccation caused short active periods of lichens during bright and drier seasons and on exposed microhabitats, the rapid, non-regulated non-photochemical quenching mechanisms in the photobiont had a significant role in protecting the photosynthetic system in the hydrated state. In dehydrated conditions, thalli were mainly defended by the solar screening metabolites produced by the mycobiont and curling during desiccation (also caused by the mycobiont). Furthermore, the efficacy of light use (higher chlorophyll and carotenoid concentration) increased because of short hydrated periods. Still, a lower level of received irradiation was appropriate for photosynthesis in dry seasons and on sun exposed habitats. In humid seasons and microhabitats, more extended active periods lead to increased photosynthesis and production of solar radiation protectant fungal metabolites, allowing a lower level of photoprotection in the form of regulated non-photochemical quenching by the photobiont. Interspecific differences were more pronounced than the intraspecific ones among seasons and microhabitat types.
英文关键词	photoacclimation seasonality microhabitat species-specific response lichen secondary metabolites plastid pigments
类型	Article ; Early Access
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000728440600001
WOS关键词	XANTHOPHYLL-CYCLE ACTIVITY ; 2 ANTARCTIC LICHENS ; USNIC-ACID ; CHLOROPHYLL FLUORESCENCE ; LOBARIA-PULMONARIA ; SEASONAL-CHANGES ; SOIL CRUST ; ASTEROCHLORIS TREBOUXIOPHYCEAE ; PHYSIOLOGICAL INTERPRETATION ; PHOTOSYNTHETIC PRODUCTIVITY
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374698
作者单位	[Veres, Katalin; Engel, Rita; Szabo, Krisztina; Farkas, Edit] Inst Ecol & Bot, Ctr Ecol Res, Alkotmany U 2-4, H-2163 Vacratot, Hungary; [Csintalan, Zsolt] Hungarian Univ Agr & Life Sci, Inst Biol Sci, Dept Plant Physiol & Ecol, Pater K U 1, H-2100 Godollo, Hungary; [Laufer, Zsanett] Bukk Natl Pk Directorate,Sanc U 6, H-3304 Eger, Hungary
推荐引用方式 GB/T 7714	Veres, Katalin,Csintalan, Zsolt,Laufer, Zsanett,et al. Photoprotection and high-light acclimation in semi-arid grassland lichens - a cooperation between algal and fungal partners[J],2021.
APA	Veres, Katalin,Csintalan, Zsolt,Laufer, Zsanett,Engel, Rita,Szabo, Krisztina,&Farkas, Edit.(2021).Photoprotection and high-light acclimation in semi-arid grassland lichens - a cooperation between algal and fungal partners.SYMBIOSIS.
MLA	Veres, Katalin,et al."Photoprotection and high-light acclimation in semi-arid grassland lichens - a cooperation between algal and fungal partners".SYMBIOSIS (2021).