Seedling Establishment of Tall Fescue Exposed to Long-Term Starvation Stress
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F16%3A00469794" target="_blank" >RIV/86652079:_____/16:00469794 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1371/journal.pone.0166131" target="_blank" >http://dx.doi.org/10.1371/journal.pone.0166131</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1371/journal.pone.0166131" target="_blank" >10.1371/journal.pone.0166131</a>
Alternative languages
Result language
angličtina
Original language name
Seedling Establishment of Tall Fescue Exposed to Long-Term Starvation Stress
Original language description
In germinating seeds under unfavorable environmental conditions, the mobilization of stores in the cotyledons is delayed, which may result in a different modulation of carbohydrates balance and a decrease in seedling vigor. Tall fescue (Festuca arundinacea Schreb.) caryopses grown at 4 degrees C in the dark for an extended period in complete absence of nutrients, showed an unexpected ability to survive. Seedlings grown at 4 degrees C for 210 days were morphologically identical to seedlings grown at 23 degrees C for 21 days. After 400 days, seedlings grown at 4 degrees C were able to differentiate plastids to chloroplast in just few days once transferred to the light and 23 degrees C. Tall fescue exposed to prolonged period at 4 degrees C showed marked anatomical changes: cell wall thickening, undifferentiated plastids, more root hairs and less xylem lignification. Physiological modifications were also observed, in particular related to sugar content, GA and ABA levels and amylolytic enzymes pattern. The phytohormones profiles exhibited at 4 and 23 degrees C were comparable when normalized to the respective physiological states. Both the onset and the completion of germination were linked to GA and ABA levels, as well as to the ratio between these two hormones. All plants showed a sharp decline in carbohydrate content, with a consequent onset of gradual sugar starvation. This explained the slowed then full arrest in growth under both treatment regimes. The analysis of amylolytic activity showed that Ca2+ played a central role in the stabilization of several isoforms. Overall, convergence of starvation and hormone signals meet in crosstalk to regulate germination, growth and development in tall fescue.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EH - Ecology - communities
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PLoS ONE
ISSN
1932-6203
e-ISSN
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Volume of the periodical
11
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
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UT code for WoS article
000387725000067
EID of the result in the Scopus database
2-s2.0-84994418137