1989
DOI: 10.1051/forest:198905art0175
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Phloem loading and unloading

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Cited by 5 publications
(3 citation statements)
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References 18 publications
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“…As such three possible pathways are identified: apoplastic, symplastic, and a combination of both i.e. a symplastic route interrupted by an apoplastic step (111,112). However, for most sinks the symplastic route is considered to be the common mode for unloading (111,113,114).…”
Section: Phloem Unloadingmentioning
confidence: 98%
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“…As such three possible pathways are identified: apoplastic, symplastic, and a combination of both i.e. a symplastic route interrupted by an apoplastic step (111,112). However, for most sinks the symplastic route is considered to be the common mode for unloading (111,113,114).…”
Section: Phloem Unloadingmentioning
confidence: 98%
“…The symplastic unloading pathway assumes that photoassimilates and other solutes move passively through plasmodesmata canals by diffusion (106). In the stems of various species, phloem unloading to the sinks is apoplastic (112,116). The apoplastic unloading requires the photoassimilates to move across the SE-CC plasma membrane which invokes an active process (84).…”
Section: Phloem Unloadingmentioning
confidence: 99%
“…Fifteen 20-year-old trees from a CCT-Plots trial that had been thinned 5 times and five 14-year-old trees belonging to stands that INTRODUCTION Il est traditionnellement admis que la section droite d'une tige, c'est-à-dire la section perpendiculaire à l'axe, est un disque parfait ou quasi parfait alors que ceci reste en fait l'exception (Bouillet, 1993). Le cas de l'excentricité, parfois très prononcée de Pinus pinasterdans le massif des Landes (Polge et Illy, 1967 ;Boissieras, 1984 ;Coué et al, 1990) en est un exemple bien connu. Or «l'excentricité» (eccentricity), qui englobe à la fois l'excentricité proprement dite (non concordance entre le centre de la section et la moelle de l'arbre) et le méplat dû à la croissance préférentielle d'un diamètre, a des répercussions négatives d'un point de vue technologique (Coué et al, 1990, Fournier, 1989 (Delrot et Bonnemain, 1989 ;Larson, 1963 ;Wilson et Archer, 1981, 1983Wilson, 1981 ; Morey et Cronshaw, 1968 ;Wilson et Archer, 1977, citée par Fournier, 1990 ;Lanner, 1985 ;Funada et al, 1989). Même si l'action précise de ces facteurs fait encore l'objet d'interprétations différentes (Champagnat, 1989 ;Jacquiot, 1984 ;Lachaud, 1992, comm (Vité, 1959a, b ;Granier, 1977).…”
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