Hormonal Profiles in Summer and Winter Shoot Apices of Five Aquatic Plant Species

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F25%3A00639419" target="_blank" >RIV/61389030:_____/25:00639419 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/25:00639419 RIV/61989592:15310/25:73634377

Výsledek na webu

<a href="https://doi.org/10.1111/ppl.70527" target="_blank" >https://doi.org/10.1111/ppl.70527</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/ppl.70527" target="_blank" >10.1111/ppl.70527</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hormonal Profiles in Summer and Winter Shoot Apices of Five Aquatic Plant Species

Popis výsledku v původním jazyce

We compared the hormonal levels in summer and winter shoot apices/fronds of five aquatic species with insufficiently known overwintering strategies with their dark respiration rates as a criterion for dormancy. Miniature samples of shoot apices/fronds were extracted and analyzed by UHPLC-ESI-MS/MS. Dark respiration of summer and winter shoot apices was measured using a Clark-type oxygen sensor. A simple growth test was conducted on Lemna trisulca and Ricciocarpos natans to ascertain their strength of dormancy. Variable respiration rates of turions and winter apices/fronds revealed marked interspecific differences in levels of dormancy. The winter total cytokinin (CK) content usually resembled the summer one or was significantly lower, with great interspecific differences. Active CKs decreased by about two times in winter. Also, the content of the active auxin IAA was usually lower than in summer, but in L. trisulca it rose 4.5 times. Increased abscisic acid (ABA) winter content (11–3124 nmol kgDW−1) confirmed its significant accumulation in four species studied, except for Utricularia inflata. Generally, mature dormant turions have low dark respiration rates, in comparison with non-dormant winter shoot apices/fronds, at least on a dry-weight basis. Deviations from the rule correlate with the power of turion dormancy, which is variable among species and represents a continuous gradient from dormancy to quiescence. Concerning overwintering strategies in aquatic plants, the hormonal regulation of the formation of either turions or non-dormant winter apices is not universal.

Název v anglickém jazyce

Hormonal Profiles in Summer and Winter Shoot Apices of Five Aquatic Plant Species

Popis výsledku anglicky

We compared the hormonal levels in summer and winter shoot apices/fronds of five aquatic species with insufficiently known overwintering strategies with their dark respiration rates as a criterion for dormancy. Miniature samples of shoot apices/fronds were extracted and analyzed by UHPLC-ESI-MS/MS. Dark respiration of summer and winter shoot apices was measured using a Clark-type oxygen sensor. A simple growth test was conducted on Lemna trisulca and Ricciocarpos natans to ascertain their strength of dormancy. Variable respiration rates of turions and winter apices/fronds revealed marked interspecific differences in levels of dormancy. The winter total cytokinin (CK) content usually resembled the summer one or was significantly lower, with great interspecific differences. Active CKs decreased by about two times in winter. Also, the content of the active auxin IAA was usually lower than in summer, but in L. trisulca it rose 4.5 times. Increased abscisic acid (ABA) winter content (11–3124 nmol kgDW−1) confirmed its significant accumulation in four species studied, except for Utricularia inflata. Generally, mature dormant turions have low dark respiration rates, in comparison with non-dormant winter shoot apices/fronds, at least on a dry-weight basis. Deviations from the rule correlate with the power of turion dormancy, which is variable among species and represents a continuous gradient from dormancy to quiescence. Concerning overwintering strategies in aquatic plants, the hormonal regulation of the formation of either turions or non-dormant winter apices is not universal.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Physiologia Plantarum

ISSN

0031-9317

e-ISSN

1399-3054

Svazek periodika

177

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

e70527

Kód UT WoS článku

001574516400001

EID výsledku v databázi Scopus

2-s2.0-105016470685