Cambial activity and intra-annual xylem formation in roots and stems of Abies balsamea and Picea mariana.

Annals of Botany
Maxime Thibeault-MartelSergio Rossi

Abstract

Studies on xylogenesis focus essentially on the stem, whereas there is basically no information about the intra-annual growth of other parts of the tree. As roots strongly influence carbon allocation and tree development, knowledge of the dynamics of xylem production and maturation in roots at a short time scale is required for a better understanding of the phenomenon of tree growth. This study compared cambial activity and xylem formation in stem and roots in two conifers of the boreal forest in Canada. Wood microcores were collected weekly in stem and roots of ten Abies balsamea and ten Picea mariana during the 2004-2006 growing seasons. Cross-sections were cut using a rotary microtome, stained with cresyl violet acetate and observed under visible and polarized light. The number of cells in the cambial zone and in differentiation, plus the number of mature cells, was counted along the developing xylem. Xylem formation lasted from the end of May to the end of September, with no difference between stem and roots in 2004-2005. On the contrary, in 2006 a 1-week earlier beginning of cell differentiation was observed in the stem, with cell wall thickening and lignification in roots ending up to 22 d later than in the stem. Cell pro...Continue Reading

References

Oct 3, 1999·Comptes rendus de l'Académie des sciences. Série III, Sciences de la vie·S LachaudJ L Bonnemain
Mar 12, 2005·Annals of Botany·Jozica GricarUwe Schmitt
Oct 20, 2007·The New Phytologist·Sergio RossiMarco Carrer

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Citations

Dec 17, 2011·Journal of Experimental Botany·Sergio RossiAnnie Deslauriers
Mar 4, 2010·Tree Physiology·Andreas GruberWalter Oberhuber
Jan 3, 2012·Tree Physiology·Carlo LupiSergio Rossi
Apr 23, 2013·Tree Physiology·Loïc D'OrangevilleHubert Morin
Oct 31, 2013·Tree Physiology·Tuomo KalliokoskiSune Linder
Oct 9, 2012·Annals of Botany·Jacqueline Boulouf LugoSergio Rossi
Dec 1, 2015·Botanical Studies·Aylin GüneyManfred Küppers
Jun 8, 2010·Plant, Cell & Environment·Carlo LupiSergio Rossi
Jun 25, 2010·Trees : Structure and Function·Walter Oberhuber, Andreas Gruber
Feb 27, 2016·Tree Physiology·Emanuele ZiacoAnnie Deslauriers

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