Plant height and hydraulic vulnerability to drought and cold

Autor(es):Mostrar menos -

Olson, Mark E. ^[1] ; Soriano, Diana ^[1] ; Rosell, Julieta A. ^[2] ; Anfodillo, Tommaso ^[3] ; Donoghue, Michael J. ^{[4, 1]} ; Edwards, Erika J. ^[4] ; Leon-Gomez, Calixto ^[1] ; Dawson, Todd ^{[5, 6]} ; Julio Camarero Martinez, J. ^[7] ; Castorena, Matiss ^{[8, 1]} ; Echeverria, Alberto ^[1] ; Espinosa, Carlos I. ^[9] ; Fajardo, Alex ^[10] ; Gazol, Antonio ^[7] ; Isnard, Sandrine ^[11] ; Lima, Rivete S. ^[12] ; Marcati, Carmen R. ^[13] ; Mendez-Alonzo, Rodrigo ^[14]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF - Mexico

^[2] Univ Nacl Autonoma Mexico, Inst Ecol, Lab Nacl Ciencias Sostenibilidad, Cdmx 04510 - Mexico

^[3] Univ Padua, Dept Terr & Sistemi Agroforestali, I-35020 Legnaro, PD - Italy

^[4] Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06520 - USA

^[5] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 - USA

^[6] Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 - USA

^[7] CSIC, Inst Pirenaico Ecol, Zaragoza 50059 - Spain

^[8] Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 - USA

^[9] Univ Tecn Particular Loja, San Cayetano Alto Sn, Loja - Ecuador

^[10] Univ Austral Chile, Ctr Invest Ecosistemas Patagonia Conicyt Reg R10C, Coyhaique 5951601 - Chile

^[11] Univ Montpellier, Bot & Modelling Plant Architecture & Vegetat Join, Ctr Cooperat Int Rech Agron Dev, Inst Rech Dev, CNRS, INRA, Noumea 98800 - New Caledonia

^[12] Univ Fed Paraiba, Dept Sistemat & Ecol, BR-58051900 Joao Pessoa, Paraiba - Brazil

^[13] Univ Estadual Paulista, Fac Ciencias Agron, BR-18603970 Botucatu, SP - Brazil

^[14] Ctr Invest Cient & Educ Super Ensenada, Dept Biol Conservac, Ensenada 22860, Baja California - Mexico

• Tipo de documento: Artigo Científico
• Fonte: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA; v. 115, n. 29, p. 7551-7556, JUL 17 2018.
• Citações Web of Science: 38

Resumo

Understanding how plants survive drought and cold is increasingly important as plants worldwide experience dieback with drought in moist places and grow taller with warming in cold ones. Crucial in plant climate adaptation are the diameters of water-transporting conduits. Sampling 537 species across climate zones dominated by angiosperms, we find that plant size is unambiguously the main driver of conduit diameter variation. And because taller plants have wider conduits, and wider conduits within species are more vulnerable to conduction-blocking embolisms, taller conspecifics should be more vulnerable than shorter ones, a prediction we confirm with a plantation experiment. As a result, maximum plant size should be short under drought and cold, which cause embolism, or increase if these pressures relax. That conduit diameter and embolism vulnerability are inseparably related to plant size helps explain why factors that interact with conduit diameter, such as drought or warming, are altering plant heights worldwide. (AU)

• Processo FAPESP: 14/14778-6 - Taper dos vasos do xilema e as causas hidráulicas de resposta das plantas às mudanças climáticas
• Beneficiário: Carmen Regina Marcati
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional
• Processo FAPESP: 15/14954-1 - Atividade cambial e estrutura dos tecidos secundários em angiospermas
• Beneficiário: Carmen Regina Marcati
• Modalidade de apoio: Auxílio à Pesquisa - Regular