Transition dates from earlywood to latewood and early phloem to late phloem in Norway Spruce

Jožica Gričar (Avtor), Katarina Čufar (Avtor), Klemen Eler (Avtor), Vladimir Gryc (Avtor), Hanuš Vavrčík (Avtor), Martin De Luis (Avtor), Peter Prislan (Avtor)

Povzetek

Climate change will affect radial growth patterns of trees, which will result in different forest productivity, wood properties, and timber quality. While many studies have been published on xylem phenology and anatomy lately, little is known about the phenology of earlywood and latewood formation, also in relation to cambial phenology. Even less information is available for phloem. Here, we examined year-to-year variability of the transition dates from earlywood to latewood and from early phloem to late phloem in Norway spruce (Picea abies) from three temperate sites, two in Slovenia and one in the Czech Republic. Data on xylem and phloem formation were collected during 2009-2011. Sensitivity analysis was performed to determine the specific contribution of growth rate and duration on wood and phloem production, separately for early and late formed parts. We found significant differences in the transition date from earlywood to latewood between the selected sites, but not between growth seasons in trees from the same site. It occurred in the first week of July at PAN and MEN and more than two weeks later at RAJ. The duration of earlywood formation was longer than that of latewood formation; from 31.4 days at PAN to 61.3 days at RAJ. In phloem, we found differences in transition date from early phloem to late phloem also between the analysed growth seasons; from 2.5 weeks at PAN to 4 weeks at RAJ Compared to the transition from earlywood to latewood the transition from early phloem to late phloem occurred 25-64 days earlier. There was no significant relationship between the onset of cambial cell production and the transition dates. The findings are important to better understand the inter-annual variability of these phenological events in spruce from three contrasting temperate sites, and how it is reflected in xylem and phloem anatomy.

Ključne besede

Picea abiess;nastanek ksilema;nastanek floema;kambij;Picea abies;xylem formation;phloem formation; cambium;tracheid;sieve cell;conifer;temperate environment;

Podatki

Jezik:	Angleški jezik
Leto izida:	2021
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL - Univerza v Ljubljani
UDK:	630*81
COBISS:	55767811
ISSN:	1999-4907
Št. ogledov:	587
Št. prenosov:	435
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarne ključne besede:	Picea abiess;nastanek ksilema;nastanek floema;kambij;
Vrsta dela (COBISS):	Članek v reviji
Komentar vira:	Nasl. z nasl. zaslona; Opis vira z dne 18. 3. 2021; Avtorji iz SLov.: Jožica Gričar, Katarina Čufar, Klemen Eler, Peter Prislan;
Strani:	14 str.
Letnik:	ǂiss. ǂ3
Zvezek:	ǂarticle ǂ331
Čas izdaje:	2021
DOI:	10.3390/f12030331
ID:	14657157