Effects of limited water availability on xylem transport in liana Humulus lupulus L

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F16%3A50005371" target="_blank" >RIV/62690094:18470/16:50005371 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/16:00087951 RIV/00216208:11310/16:10327905

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S009884721630096X" target="_blank" >http://www.sciencedirect.com/science/article/pii/S009884721630096X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.envexpbot.2016.05.008" target="_blank" >10.1016/j.envexpbot.2016.05.008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of limited water availability on xylem transport in liana Humulus lupulus L

Popis výsledku v původním jazyce

The transport and distribution of water in the plant body are essential for plant growth and development. Although the negative effects of long-term drought on xylem water transport are generally known, our knowledge of the impacts of short-term periodical changes in water availability on xylem structure and function remains limited. The aim of this study was to investigate the effects of limited water availability imposed as repeated periods of drought and rehydration on xylem structure and function in stems of a commercially important climber (Humulus lupulus L.). To evaluate drought-induced changes in xylem characteristics, hydraulic measurements, silicone injection, and anatomical observations were performed in basal and apical regions of hop stems. We found that the total measured hydraulic conductivity (K-h) was about 8.5 times lower in the basal regions of drought-treated plants compared to well-watered control plants, especially due to vessel clogging with tyloses. In contrast, K-h of the apical parts of drought-treated plants was higher than in control plants as a result of the enhanced production of secondary xylem. We also observed differences in K-h response to sap ionic composition, with the highest ionic effect in the apical segments of control plants. Greater variation of inner vessel diameter, which increased the transport lumen resistivity of individual vessels by 7%, was another important consequence of irregular watering. The results of our study indicate that periodical fluctuations in water availability induce a significant reduction in total stem transport efficiency and increased risk of vessel dysfunction and illustrate the negative effects of limited water availability for water transport in hop plant stems.

Název v anglickém jazyce

Effects of limited water availability on xylem transport in liana Humulus lupulus L

Popis výsledku anglicky

The transport and distribution of water in the plant body are essential for plant growth and development. Although the negative effects of long-term drought on xylem water transport are generally known, our knowledge of the impacts of short-term periodical changes in water availability on xylem structure and function remains limited. The aim of this study was to investigate the effects of limited water availability imposed as repeated periods of drought and rehydration on xylem structure and function in stems of a commercially important climber (Humulus lupulus L.). To evaluate drought-induced changes in xylem characteristics, hydraulic measurements, silicone injection, and anatomical observations were performed in basal and apical regions of hop stems. We found that the total measured hydraulic conductivity (K-h) was about 8.5 times lower in the basal regions of drought-treated plants compared to well-watered control plants, especially due to vessel clogging with tyloses. In contrast, K-h of the apical parts of drought-treated plants was higher than in control plants as a result of the enhanced production of secondary xylem. We also observed differences in K-h response to sap ionic composition, with the highest ionic effect in the apical segments of control plants. Greater variation of inner vessel diameter, which increased the transport lumen resistivity of individual vessels by 7%, was another important consequence of irregular watering. The results of our study indicate that periodical fluctuations in water availability induce a significant reduction in total stem transport efficiency and increased risk of vessel dysfunction and illustrate the negative effects of limited water availability for water transport in hop plant stems.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Environmental and experimental botany

ISSN

0098-8472

e-ISSN

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Svazek periodika

130

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

22-32

Kód UT WoS článku

000381325000003

EID výsledku v databázi Scopus

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