English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effect of dehydration stress on membrane competence among and within  Fragaria  species was evaluated using index of injury, I  d  , and tissue ionic conductance, g  Ti.   Single accessions of  F. chiloensis  ssp.  lucida  Duch.,  F. virginiana  ssp.  glauca  (S. Watson) Staudt,  F. virginiana  ssp.  virginiana  Duch.,  F. ×ananassa  Duch., and  F. vesca  L. were used to study interspecific variation. Leaf thickness and total electrolyte content were greatest for the  F. chiloensis  ssp.  lucida  accession and least for the  F. virginiana  ssp.  glauca  accession, but foliar electrolyte concentration did not vary across accessions. The g  Ti   values were &gt;5-fold higher from 0 to 2 hours than for other intervals, declining over time. Significant differences in g  Ti   and I  d   values were only evident at 2 and 4 hours within stress levels, and increased as stress level increased. While the  F. chiloensis  ssp.  lucida  accession exhibited low g  Ti   values at 70% relative water content (RWC), it showed greater relative membrane injury than the other species expressed as g  Ti  , I  d  , or the ratio of stress g  Ti   to control g  Ti   as dehydration level increased. Although the  F. virginiana  ssp.  glauca  accession had the highest g  Ti   values, even at 100% RWC, its relative injury as stress level increased was not as great as that of the  F. chiloensis  accession. In a second experiment, intraspecific variation was examined using four accessions each of  F. chiloensis  and of  F. virginiana  which were dehydrated to 50% RWC. The species mean g  Ti  , I  d  , and g  Ti   ratio values at 2 and 4 hours for the  F. chiloensis  accessions were lower than those for the  F. virginiana  accessions, but significant intraspecific variation was also observed. In spite of the differences between species means, the evidence of intraspecific variation indicates that not all accessions of a species exhibit similar drought responses (i.e., membrane competence). Due to the consistent conclusions derived from using either g  Ti   or I  d   after 2 or 4 hours of incubation for characterization of membrane competence, g  Ti   and I  d   were comparable techniques for identification of potential drought tolerance in  Fragaria.

Membrane Competence among and within Fragaria Species Varies in Response to Dehydration Stress