Norway spruce embryogenesis: changes in carbohydrate profile, structural development and response to polyethylene glycol

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10324834" target="_blank" >RIV/00216208:11310/16:10324834 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1093/treephys/tpw016" target="_blank" >http://dx.doi.org/10.1093/treephys/tpw016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/treephys/tpw016" target="_blank" >10.1093/treephys/tpw016</a>

Result language

angličtina

Original language name

Norway spruce embryogenesis: changes in carbohydrate profile, structural development and response to polyethylene glycol

Original language description

Two unrelated, geographically distinct, highly embryogenic lines of Norway spruce Picea abies (L.) Karst.) were analysed to identify metabolic traits characteristic for lines with good yields of high-quality embryos. The results were compared with corresponding characteristics of a poorly productive line (low embryo yield, scarce high-quality embryos). The following carbohydrate profiles and spectra during maturation, desiccation and germination were identified as promising characteristics for line evaluation: a gradual decrease in total soluble carbohydrates with an increasing sucroseaEuro...:aEuro...hexose ratio during maturation; accumulation of raffinose family oligosaccharides resulting from desiccation and their rapid degradation at the start of germination; and a decrease in sucrose, increase in hexoses and the appearance of pinitol with proceeding germination. We propose that any deviation from this profile in an embryonic line is a symptom of inferior somatic embryo development. We further propose that a fatty acid spectrum dominated by linoleic acid (18aEuro...:aEuro...2) was a common feature of healthy spruce somatic embryos, although it was quite different from zygotic embryos mainly containing oleic acid (18aEuro...:aEuro...1). The responses of the lines to osmotic stress were evaluated based on comparison of control (without osmoticum) and polyethylene glycol (PEG)-exposed (PEG 4000) variants. Although genetically distinct, both highly embryogenic lines responded in a very similar manner, with the only difference being sensitivity to high concentrations of PEG. At an optimum PEG concentration (3.75 and 5%), which was line specific, negative effects of PEG on embryo germination were compensated for by a higher maturation efficiency so that the application of PEG at an appropriate concentration improved the yield of healthy germinants per gram of initial embryonal mass and accelerated the process.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

ED - Physiology

OECD FORD branch

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Project

<a href="/en/project/LO1417" target="_blank" >LO1417: Centre of Experimental Plant Biology of CU</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Tree Physiology

ISSN

0829-318X

e-ISSN

—

Volume of the periodical

36

Issue of the periodical within the volume

5

Country of publishing house

CA - CANADA

Number of pages

14

Pages from-to

548-561

UT code for WoS article

000377403300003

EID of the result in the Scopus database

2-s2.0-84971537745