Hydraulic-stomatal coordination in tree seedlings : tight correlation across environments and ontogeny in Acer pseudoplatanus

© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.

Détails bibliographiques
Publié dans:The New phytologist. - 1984. - 232(2021), 3 vom: 26. Nov., Seite 1297-1310
Auteur principal: Beikircher, Barbara (Auteur)
Autres auteurs: Sack, Lawren, Ganthaler, Andrea, Losso, Adriano, Mayr, Stefan
Format: Article en ligne
Langue:English
Publié: 2021
Accès à la collection:The New phytologist
Sujets:Journal Article Research Support, Non-U.S. Gov't acclimation hydraulic conductance ontogeny seedling stomatal conductance tree hydraulics xylem anatomy Water 059QF0KO0R
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520 |a Hydraulic conductance is recognized as a major determinant of gas exchange and productivity. However, whether this also applies to seedlings, a critically important stage for vegetation regeneration, has been largely unknown. We analyzed the hydraulic and stomatal conductance of leaves and shoots for 6-wk-old Acer pseudoplatanus seedlings emerging in different lowland and treeline habitats and under glasshouse conditions, respectively, as well as on 9-, 15- and 18-wk-old plants, and related findings to leaf and xylem anatomical traits. Treeline seedlings had higher leaf area-specific shoot hydraulic conductance (Kshoot-L ), and stomatal conductance (gs ), associated with wider xylem conduits, lower leaf area and higher stomatal density than lowland and glasshouse-grown plants. Across the first 18 wk of development, seedlings increased four-fold in absolute shoot hydraulic conductance (Kshoot ) and declined by half in Kshoot-L , with correlated shifts in xylem and leaf anatomy. Distal leaves had higher leaf hydraulic conductance (Kleaf ) and gs compared to basal leaves. Seedlings show strong variation across growth environments and ontogenetic shifts in hydraulic and anatomical parameters. Across growth sites, ontogenetic stages and leaf orders, gs was tightly correlated with Kshoot-L and Kleaf , balancing hydraulic supply with demand for the earliest stages of seedling establishment 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a acclimation 
650 4 |a hydraulic conductance 
650 4 |a ontogeny 
650 4 |a seedling 
650 4 |a stomatal conductance 
650 4 |a tree hydraulics 
650 4 |a xylem anatomy 
650 7 |a Water  |2 NLM 
650 7 |a 059QF0KO0R  |2 NLM 
700 1 |a Sack, Lawren  |e verfasserin  |4 aut 
700 1 |a Ganthaler, Andrea  |e verfasserin  |4 aut 
700 1 |a Losso, Adriano  |e verfasserin  |4 aut 
700 1 |a Mayr, Stefan  |e verfasserin  |4 aut 
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773 1 8 |g volume:232  |g year:2021  |g number:3  |g day:26  |g month:11  |g pages:1297-1310 
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