Stomatal density and mechanics are critical for high productivity insights from amphibious ferns

Stomatal density and mechanics are critical for high productivity : insights from amphibious ferns

© 2020 The Authors New Phytologist © 2020 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 229(2021), 2 vom: 01. Jan., Seite 877-889
1. Verfasser: Westbrook, Anna S (VerfasserIn)
Weitere Verfasser: McAdam, Scott A M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, N.I.H., Extramural Research Support, U.S. Gov't, Non-P.H.S. Marsilea drummondii Marsilea minuta Regnellidium diphyllum aquatic ferns early angiosperms photosynthesis stomata mehr... Water 059QF0KO0R
Beschreibung
Zusammenfassung:© 2020 The Authors New Phytologist © 2020 New Phytologist Trust.
Angiosperm dominance in terrestrial landscapes is partially attributable to high photosynthetic capacities. Angiosperms benefit from diverse anatomical and physiological adaptations, making it difficult to determine which factors may have been prerequisites for the evolution of enhanced photosynthetic rates in this group. We employed a novel approach to this problem: comparisons between angiosperms and Marsileaceae, a family of semi-aquatic ferns that are among the only land plants to match angiosperm photosynthetic rates. We found that Marsileaceae have very high stomatal densities and, like angiosperms but unlike all other ferns previously studied, exhibit wrong-way stomatal responses to excision. These results suggest that stomatal density and a little-studied angiosperm trait, the capacity for lateral displacement of guard cells into neighboring epidermal cells, are crucial for facilitating high rates of gas exchange. Our analysis also associates these adaptations in Marsileaceae with an increased risk of excessive water loss during drought. Our findings indicate that evolution in stomatal physiology was a prerequisite for high photosynthetic capacities in vascular plants and a key driver of the abrupt Cretaceous rise of the angiosperms
Beschreibung:Date Completed 14.05.2021
Date Revised 14.05.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.16850