Stomata: Active Portals for Flourishing on Land
نویسنده
چکیده
Two studies suggest early land plants could actively control stomata, facilitating gas exchange while limiting water loss, a critical adaption to life on land.
منابع مشابه
Fern Stomatal Responses to ABA and CO2 Depend on Species and Growth Conditions.
Changing atmospheric CO2 levels, climate, and air humidity affect plant gas exchange that is controlled by stomata, small pores on plant leaves and stems formed by guard cells. Evolution has shaped the morphology and regulatory mechanisms governing stomatal movements to correspond to the needs of various land plant groups over the past 400 million years. Stomata close in response to the plant h...
متن کاملLand Plants Acquired Active Stomatal Control Early in Their Evolutionary History
Stomata are pores that regulate plant gas exchange [1]. They evolved more than 400 million years ago [2, 3], but the origin of their active physiological responses to endogenous and environmental cues is unclear [2-6]. Recent research suggests that the stomata of lycophytes and ferns lack pore closure responses to abscisic acid (ABA) and CO(2). This evidence led to the hypothesis that a fundame...
متن کاملOrigins and Evolution of Stomatal Development1[OPEN]
The fossil record suggests stomata-like pores were present on the surfaces of land plants over 400 million years ago. Whether stomata arose once or whether they arose independently across newly evolving land plant lineages has long been a matter of debate. In Arabidopsis, a genetic toolbox has been identified that tightly controls stomatal development and patterning. This includes the basic hel...
متن کاملOrigins and Evolution of Stomatal Development.
The fossil record suggests stomata-like pores were present on the surfaces of land plants over 400 million years ago. Whether stomata arose once or whether they arose independently across newly evolving land plant lineages has long been a matter of debate. In Arabidopsis, a genetic toolbox has been identified that tightly controls stomatal development and patterning. This includes the basic hel...
متن کاملPaleoecology, Ploidy, Paleoatmospheric Composition, and Developmental Biology: A Review of the Multiple Uses of Fossil Stomata.
The presence of stomata is a diagnostic trait of all living and extinct land plants with the exception of liverworts. They are preserved widely in the fossil record from anatomically pristine stomatal complexes on permineralized and charcoalified stems of the earliest land plants dating back .400 million years to isolated guard cell pairs in quaternary aged palynological samples. Detailed study...
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ورودعنوان ژورنال:
- Current Biology
دوره 21 شماره
صفحات -
تاریخ انتشار 2011