Synchronisms and correlations of spring phenology between apical and lateral meristems in two boreal conifers

被引:55
作者
Antonucci, Serena [1 ,2 ]
Rossi, Sergio [2 ,3 ]
Deslauriers, Annie [2 ]
Lombardi, Fabio [1 ]
Marchetti, Marco [1 ]
Tognetti, Roberto [1 ,4 ]
机构
[1] Univ Molise, Dipartimento Biosci & Terr, I-86090 Pesche, IS, Italy
[2] Univ Quebec Chicoutimi, Dept Sci Fondamentales, Chicoutimi, PQ G7H SB1, Canada
[3] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou, Guangdong, Peoples R China
[4] Edmund Mach Fdn, EFI Project Ctr Mt Forests MOUNTFOR, I-38010 San Michele All Adige, TN, Italy
基金
加拿大自然科学与工程研究理事会;
关键词
balsam fir; black spruce; bud break; cambium; temperature; xylogenesis; SACHALINENSIS SCHMIDT MASTERS; LOCALLY HEATED STEMS; SPRUCE PICEA-ABIES; CAMBIAL ACTIVITY; CLIMATE-CHANGE; WOOD FORMATION; BUD BURST; XYLEM FORMATION; BLACK SPRUCE; VASCULAR DIFFERENTIATION;
D O I
10.1093/treephys/tpv077
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Phenological synchronisms between apical and lateral meristems could clarify some aspects related to the physiological relationships among the different organs of trees. This study correlated the phenological phases of bud development and xylem differentiation during spring 2010-14 in balsam fir (Abies balsamea Mill.) and black spruce [(Picea mariana Mill. (BSP)] of the Monts-Valin National Park (Quebec, Canada) by testing the hypothesis that bud development occurs after the reactivation of xylem growth. From May to September, we conducted weekly monitoring of xylem differentiation using microcores and bud development with direct observations on terminal branches. Synchronism between the beginning of bud development and xylem differentiation was found in both species with significant correlations between the phases of bud and xylem phenology. Degree-day sum was more appropriate in assessing the date of bud growth resumption, while thermal thresholds were more suitable for cambium phenology. Our results provide new knowledge on the dynamics of spring phenology and novel information on the synchronisms between two meristems in coniferous trees. The study demonstrates the importance of precisely defining the phases of bud development in order to correctly analyse the relationships with xylem phenology.
引用
收藏
页码:1086 / 1094
页数:9
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