干旱区生态环境知识资源中心(Arid): Environmental pressures on stomatal size may drive plant genome size evolution: evidence from a natural experiment with Cape geophytes

Arid

DOI	10.1093/aob/mcaa095
	Environmental pressures on stomatal size may drive plant genome size evolution: evidence from a natural experiment with Cape geophytes
	Vesely, Pavel; Smarda, Petr; Bures, Petr; Stirton, Charles; Muasya, A. Muthama; Mucina, Ladislav; Horova, Lucie; Vesela, Kristyna; Silerova, Alexandra; Smerda, Jakub; Knapek, Ondrej
通讯作者	Smarda, P
来源期刊	ANNALS OF BOTANY
ISSN	0305-7364
EISSN	1095-8290
出版年	2020
卷号	126 期号:2 页码:323-330
英文摘要	Background and Aims The idea that genome (size) evolution in eukaryotes could be driven by environmental factors is still vigorously debated. In extant plants, genome size correlates positively with stomatal size, leading to the idea that conditions enabling the existence of large stomata in fossil plants also supported growth of their genome size. We test this inductive assumption in drought-adapted, prostrate-leaved Cape (South Africa) geophytes where, compared with their upright-leaved geophytic ancestors, stomata develop in a favourably humid microclimate formed underneath their leaves. Methods Stomatal parameters (leaf cuticle imprints) and genome size (flow cytometry) were measured in 16 closely related geophytic species pairs from seven plant families. In each pair, representing a different genus, we contrasted a prostrate-leaved species with its upright-leaved phylogenetic relative, the latter whose stomata are exposed to the ambient arid climate. Key Results Except for one, all prostrate-leaves species had larger stomata, and in 13 of 16 pairs they also had larger genomes than their upright-leaved relatives. Stomatal density and theoretical maximum conductance were less in prostrate-leaved species with small guard cells (<1 pL) but showed no systematic difference in species pairs with larger guard cells (>1 pL). Giant stomata were observed in the prostrate-leaved Satyrium bicorne (89-137 mu m long), despite its relatively small genome (2C = 9 Gbp). Conclusions Our results imply that climate, through selection on stomatal size, might be able to drive genome size evolution in plants. The data support the idea that plants from 'greenhouse' geological periods with large stomata might have generally had larger genome sizes when compared with extant plants, though this might not have been solely due to higher atmospheric CO2 in these periods but could also have been due to humid conditions prevailing at fossil deposit sites.
英文关键词	Cape Floristic Region carbon dioxide flow cytometry fossil plants genome size evolution geophyte paleoclimate South Africa stomatal size
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000561731700011
WOS关键词	LAND PLANTS ; CELL-SIZE ; DENSITY ; DNA ; CO2 ; CONDUCTANCE ; ADAPTATION ; PLASTICITY ; DIVERSITY ; PATTERNS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325760
作者单位	[Vesely, Pavel; Smarda, Petr; Bures, Petr; Horova, Lucie; Vesela, Kristyna; Silerova, Alexandra; Smerda, Jakub; Knapek, Ondrej] Masaryk Univ, Dept Bot & Zool, Kotlarska 2, CZ-61137 Brno, Czech Republic; [Stirton, Charles; Muasya, A. Muthama] Univ Cape Town, Bolus Herbarium, Dept Biol Sci, ZA-7701 Cape Town, South Africa; [Mucina, Ladislav] Murdoch Univ, Harry Butler Inst, Iluka Chair Vegetat Sci & Biogeog, 90 South St, Perth, WA, Australia; [Mucina, Ladislav] Stellenbosch Univ, Dept Geog & Environm Studies, Private Bag X1, ZA-7602 Stellenbosch, South Africa
推荐引用方式 GB/T 7714	Vesely, Pavel,Smarda, Petr,Bures, Petr,et al. Environmental pressures on stomatal size may drive plant genome size evolution: evidence from a natural experiment with Cape geophytes[J],2020,126(2):323-330.
APA	Vesely, Pavel.,Smarda, Petr.,Bures, Petr.,Stirton, Charles.,Muasya, A. Muthama.,...&Knapek, Ondrej.(2020).Environmental pressures on stomatal size may drive plant genome size evolution: evidence from a natural experiment with Cape geophytes.ANNALS OF BOTANY,126(2),323-330.
MLA	Vesely, Pavel,et al."Environmental pressures on stomatal size may drive plant genome size evolution: evidence from a natural experiment with Cape geophytes".ANNALS OF BOTANY 126.2(2020):323-330.