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Passive origins of stomatal control in vascular plants

journal contribution
posted on 2023-05-17, 07:09 authored by Timothy BrodribbTimothy Brodribb, McAdam, SAM
Carbon and water flow between plants and the atmosphere is regulated by the opening and closing of minute stomatal pores in surfaces of leaves. By changing the aperture of stomata, plants regulate water loss and photosynthetic carbon gain in response to many environmental stimuli, but stomatal movements cannot yet be reliably predicted. We found that the complexity that characterizes stomatal control in seed plants is absent in early-diverging vascular plant lineages. Lycophyte and fern stomata are shown to lack key responses to abscisic acid and epidermal cell turgor, making their behavior highly predictable. These results indicate that a fundamental transition from passive to active metabolic control of plant water balance occurred after the divergence of ferns about 360 million years ago.

History

Publication title

Science

Volume

331

Issue

6017

Pagination

582-585

ISSN

0036-8075

Department/School

School of Natural Sciences

Publisher

Amer Assoc Advancement Science

Place of publication

1200 New York Ave, Nw, Washington, USA, Dc, 20005

Rights statement

Copyright © 2011 The American Association for the Advancement of Science

Repository Status

  • Restricted

Socio-economic Objectives

Terrestrial biodiversity

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