Repositorio
Institucional

Niinemets, Ulo

Bravo, Leon A.#Copolovici, Lucian

Changes in photosynthetic rate and stress volatile emissions through desiccation-rehydration cycles in desiccation-tolerant epiphytic filmy ferns (Hymenophyllaceae)

WILEY

PLANT CELL AND ENVIRONMENT

en

Exposure to recurrent desiccation cycles carries a risk of accumulation of reactive oxygen species that can impair leaf physiological activity upon rehydration, but changes in filmy fern stress status through desiccation and rewatering cycles have been poorly studied. We studied foliage photosynthetic rate and volatile marker compounds characterizing cell wall modifications (methanol) and stress development (lipoxygenase [LOX] pathway volatiles and methanol) through desiccation-rewatering cycles in lower-canopy species Hymenoglossum cruentum and Hymenophyllum caudiculatum, lower- to upper-canopy species Hymenophyllum plicatum and upper-canopy species Hymenophyllum dentatum sampled from a common environment and hypothesized that lower canopy species respond more strongly to desiccation and rewatering. In all species, rates of photosynthesis and LOX volatile emission decreased with progression of desiccation, but LOX emission decreased with a slower rate than photosynthesis. Rewatering first led to an emission burst of LOX volatiles followed by methanol, indicating that the oxidative burst was elicited in the symplast and further propagated to cell walls. Changes in LOX emissions were more pronounced in the upper-canopy species that had a greater photosynthetic activity and likely a greater rate of production of photooxidants. We conclude that rewatering induces the most severe stress in filmy ferns, especially in the upper canopy species.

Artículo original

FP7 Ideas: European Research Council, Grant/Award Number: 322603, European Commission through the European Regional Fund, Grant/Award Number: Center of Excellence EcolChange, Estonian Ministry of Science and Education, Grant/Award Number: IUT-8-3

Ideas del 7PM: Consejo Europeo de Investigación, número de subvención/premio: 322603, Comisión Europea a través del Fondo Europeo Regional, número de subvención/premio: Centro de Excelencia EcolChange, Ministerio de Ciencia y Educación de Estonia, número de subvención/premio: IUT-8-3

10.1111/pce.13201

pdf

desiccation kinetics# emission bursts# Hymenophyllaceae# lipoxygenase pathway volatiles# methanol# stress recovery

http://dx.doi.org/10.1111/pce.13201

Plant Sciences

cinética de desecación# ráfagas de emisiones# himenofiláceas# volátiles de la vía de la lipoxigenasa# metanol# recuperación del estrés

Botánica

Fisiología

Ecología

version publicada

hibrida

acceso abierto

acceso abierto

WOS:000435808900011

Changes in photosynthetic rate and stress volatile emissions through desiccation-rehydration cycles in desiccation-tolerant epiphytic filmy ferns (Hymenophyllaceae)

Artículo original

WILEY

PLANT CELL AND ENVIRONMENT

Ciencias de las plantas

0140-7791

en

European Research Council 322603

ERC FP7 Ideas 322603

EC Center of Excellence EcolChange

Estonian Ministry of Science and Education [UT-8-3

FP7 Ideas: European Research Council, Grant/Award Number: 322603, European Commission through the European Regional Fund, Grant/Award Number: Center of Excellence EcolChange, Estonian Ministry of Science and Education, Grant/Award Number: IUT-8-3

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