Trunk radial growth, water and carbon relations of mature apple trees on two size-controlling rootstocks during severe summer drought

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F22%3A50019232" target="_blank" >RIV/62690094:18470/22:50019232 - isvavai.cz</a>

Alternative codes found

RIV/25271121:_____/22:N0000120

Result on the web

<a href="https://academic.oup.com/treephys/article/42/2/289/6354474?guestAccessKey=b1119b9a-98fa-4885-85ff-52f3942cd2c9" target="_blank" >https://academic.oup.com/treephys/article/42/2/289/6354474?guestAccessKey=b1119b9a-98fa-4885-85ff-52f3942cd2c9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/treephys/tpab111" target="_blank" >10.1093/treephys/tpab111</a>

Result language

angličtina

Original language name

Trunk radial growth, water and carbon relations of mature apple trees on two size-controlling rootstocks during severe summer drought

Original language description

The use of size-controlling rootstocks is central to modern high-density fruit production systems. While biological mechanisms responsible for vigor control are not fully understood, differences in water relations and carbohydrate storage ability have been suggested as two potential factors. To better understand the processes that control growth vigor, we analyzed the trunk radial variation at seasonal and diurnal timescales and measured the midday leaf water potential (MD), leaf gas exchange and concentrations of non-structural carbohydrates (NSC) in apple trees of variety ‘Jonagold’ grafted on two rootstocks of contrasting growth vigor (dwarfing J-TE-G vs invigorating J-TE-H). The measurements were conducted during an exceptionally hot and dry summer. We found that smaller annual trunk radial increments in dwarfed trees were primarily due to an earlier cessation of trunk secondary growth. The interdiurnal trunk circumference changes (C) were slightly lower in dwarfed trees, and these trees also had fewer days with positive C values, particularly during the driest summer months. The trunks of dwarfed trees shrank gradually during the drought, showed less pronounced diurnal variation of trunk circumference and the maximum trunk daily shrinkage was only weakly responsive to the vapor pressure deficit. These results indicated that lower turgidity in the cambial region may have limited the trunk radial expansion in dwarfed trees during the hot and dry days. Dwarfed trees also maintained lower MD and leaf gas exchange rates during the summer drought. These parameters decreased in parallel for both rootstock combinations, suggesting their similar drought sensitivity. Similar concentrations and seasonal dynamics of NSC in both rootstock combinations, together with their similar spring growth rates, suggest that NSC reserves were not directly limiting for growth. Our results support the prominent role of water relations in rootstock-induced size-controlling mechanisms and highlight the complexity of this topic.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2022

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

1758-4469

Volume of the periodical

42

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

289-303

UT code for WoS article

000810029400007

EID of the result in the Scopus database

2-s2.0-85124578434