Další formáty:
BibTeX
LaTeX
RIS
@article{1603776,
author = {Jupa, Radek and Doubková, Pavlína and Gloser, Vít},
article_location = {Oxford, UK},
article_number = {8},
doi = {http://dx.doi.org/10.1093/treephys/tpz035},
keywords = {branch; hydraulic conductivity; ionic effect; parenchyma; vessel; water potential; wood porosity; xylem anatomy},
language = {eng},
issn = {0829-318X},
journal = {Tree physiology},
title = {Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species},
url = {https://academic.oup.com/treephys/article-abstract/39/8/1313/5425283?redirectedFrom=fulltext},
volume = {39},
year = {2019}
}
TY - JOUR
ID - 1603776
AU - Jupa, Radek - Doubková, Pavlína - Gloser, Vít
PY - 2019
TI - Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species
JF - Tree physiology
VL - 39
IS - 8
SP - 1313-1328
EP - 1313-1328
PB - Oxford University Press
SN - 0829318X
KW - branch
KW - hydraulic conductivity
KW - ionic effect
KW - parenchyma
KW - vessel
KW - water potential
KW - wood porosity
KW - xylem anatomy
UR - https://academic.oup.com/treephys/article-abstract/39/8/1313/5425283?redirectedFrom=fulltext
L2 - https://academic.oup.com/treephys/article-abstract/39/8/1313/5425283?redirectedFrom=fulltext
N2 - Ion-mediated changes in hydraulic conductivity (Delta K-h) represent a mechanism allowing plants to regulate the rate of xylem transport. However, the significance of Delta K-h for ring-porous (RPS) and diffuse-porous tree species (DPS) remains unknown. Here, we examined Delta K-h in young branches of three coexisting, temperate RPS (Fraxinus excelsior, Quercus robur, Robinia pseudoacacia) and three DPS (Acer pseudoplatanus, Carpinus betulus, Fagus sylvatica) across the whole year, and assessed the relationships of Delta K-h to branch anatomy. Ring-porous species exhibited twice as high Delta K-h (10.3% vs 5.3%) within the growing season (i.e., during wood production) compared with DPS, and the production of the annual ring was identified as a crucial process affecting maximum Delta K-h within the season. In addition, xylem in branches of RPS generally contained more axial parenchyma (AP; 18% vs 7%) and was characterized by a greater relative contact fraction between vessels and parenchyma (FVP; 59% vs 18%) than xylem in DPS. Simultaneously, Delta K-h measured within the growing season was positively correlated with AP, FVP and bark proportions, suggesting that parenchyma in branches may be important for high Delta K-h. Significant increase in Delta K-h observed during the growing season may help RPS to restore conductive capacity after winter, better compensate transport loss by drought-induced embolism and thereby improve water delivery to leaves.
ER -
JUPA, Radek, Pavlína DOUBKOVÁ a Vít GLOSER. Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species. \textit{Tree physiology}. Oxford, UK: Oxford University Press, 2019, roč.~39, č.~8, s.~1313-1328. ISSN~0829-318X. Dostupné z: https://dx.doi.org/10.1093/treephys/tpz035.
|
