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The cambial response of Scots pine trees to girdling and water stress
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SYSNO ASEP 0524723 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The cambial response of Scots pine trees to girdling and water stress Author(s) Fajstavr, Marek (UEK-B) SAI, ORCID, RID
Giagli, K. (CZ)
Vavrčík, H. (CZ)
Gryc, V. (CZ)
Horáček, Petr (UEK-B) RID, ORCID, SAI
Urban, J. (CZ)Number of authors 6 Source Title Iawa Journal. - : Brill - ISSN 0928-1541
Roč. 41, č. 2 (2020), s. 159-185Number of pages 26 s. Language eng - English Country NL - Netherlands Keywords intraannual density-fluctuations ; wood formation ; fagus-sylvatica ; environmental-factors ; seasonal dynamics ; carbon limitation ; xylem formation ; peach-trees ; silver-fir ; growth ; Cell wall thickness ; phloem ; radial dimension ; Pinus sylvestris L. ; tracheid ; xylem ; differentiation Subject RIV GK - Forestry OECD category Forestry R&D Projects LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Limited access Institutional support UEK-B - RVO:86652079 UT WOS 000533515600003 EID SCOPUS 85086360121 DOI 10.1163/22941932-bja10004 Annotation We monitored six healthy dominant trees and six girdled Scots pine trees for two successive growing seasons (2014 and 2015) to investigate the seasonal dynamics, cambial activity, and morphology of the new xylem and phloem cells formed under environmental stress when girdling was applied during the dormant period (15 January 2014). Microcore (1.8 mm) samples were collected weekly using a Trephor tool above and below the girdling area, and weather data were measured on site. Drought stress in combination with girdling reduced the total number of differentiation days cell formation. In 2014, no significant differences in tracheid dimensions were observed between the girdled area and the control trees, while in 2015, the control trees showed significantly smaller cell wall thickness and radial dimensions of the latewood tracheids (LW) compared to 2014 and girdled trees had no occurrence of LW. Under stressful heat waves and prolonged periods of no precipitation, the trees tended to reduce the number of tracheids that were formed and exhibited smaller radial dimensions (narrower tree rings) to increase their hydraulic efficiency. Trees responded to limited water availability by forming intra-annual density fluctuations (IADFs L) in the zone of the LW to overcome stressful conditions. Although xylem cell differentiation was affected by stressful conditions, no significant variability in phloem cell dimensions was observed. Thus, the phloem tissue was less sensitive to exogenous factors. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2021 Electronic address https://brill.com/view/journals/iawa/41/2/article-p159_3.xml
Number of the records: 1