RT info:eu-repo/semantics/article
T1 Species ecology determines the role of nitrogen nutrition on the frost tolerance of pine seedlings
A1 Toca, Ovidiu Andrei
A1 Oliet Palá, Juan Antonio
A1 Villar Salvador, Pedro
A1 Jacobs , Douglass F.
K1 Cessation of shoot elongation
K1 Cold hardiness
K1 Fall fertilization
K1 Pinus
K1 Root frost tolerance
K1 Soluble carbohydrates
K1 Species ecology.
K1 Medio Ambiente
K1 Environmental science
AB Frost determines the evolution and distribution of plants in temperate and cold regions. Several environmental factors can influencefrost acclimation of woody plants but the magnitude and direction of the effect of nitrogen (N) availability is controversial.We studied the effect of N availability on root and shoot frost tolerance in mid-fall and in winter in seedlings of four pines of contrastingecology: Pinus nigra J.F. Arnold, P. pinaster Ait., P. pinea L. and P. halepensis Mill.. Organ N and soluble sugar concentration,and timing of cessation of shoot elongation were measured to assess the physiological mechanisms underlying frostacclimation. Nitrogen was supplied at high and low rates only during the pre-hardening period and at a moderate N rate duringhardening in the fall. Shoot frost tolerance increased over winter while root frost tolerance did not change in any species. PrehardeningN availability affected the frost tolerance of both roots and shoots, although the effect was species-specific: high Nreduced the overall root and shoot frost tolerance in P. pinea and P. halepensis, and increased the frost tolerance in P. nigra, buthad no effect in P. pinaster. Nitrogen supply in the fall consistently increased frost tolerance in all species
SN 0829-318X
YR 2018
FD 2018
LK http://hdl.handle.net/10017/37426
UL http://hdl.handle.net/10017/37426
LA eng
NO Comunidad de Madrid
DS MINDS@UW
RD 17-abr-2024