Evaluation of drought response of two poplar clones (Populus×canadensis Mönch ‘I-214’ and P. deltoides Marsh. ‘Dvina’) through high resolution analysis of stem growth

Giovannelli, Alessio; Deslauriers, Annie; Fragnelli, Giuseppe; Scaletti, Luciano; Castro, Gaetano Lo; Rossi, Sergio; Crivellaro, Alan

doi:10.1093/jxb/erm117

Cited by 100 publications

(96 citation statements)

References 44 publications

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“…This has e.g. been seen in Populus and paper birch (Betula papyrifera) (Giovannelli et al, 2007;Gu et al, 2007). The reduction of cell volume also concentrates the solutes in the cells and compresses the plasma membranes causing them to increases in thickness.…”

Section: Growth Changesmentioning

confidence: 78%

Stomatal Responses to Drought Stress and Air Humidity

Le¹,

Torre²,

Olsen³

et al. 2011

Abiotic Stress in Plants - Mechanisms and Adaptations

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Section: Growth Changesmentioning

confidence: 78%

Stomatal Responses to Drought Stress and Air Humidity

Le¹,

Torre²,

Olsen³

et al. 2011

Abiotic Stress in Plants - Mechanisms and Adaptations

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“…So, the separation in time between shoot growth and secondary wall thickening could reflect an internal competition for carbohydrates. As shoots have a higher ranking priority than cambium as a sink for carbon (Giovannelli et al, 2007;Minchin and Lacointe, 2005), only after shoots complete growth, could resources be allocated to the expending process of secondary wall formation of latewood cells (Renninger et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Comparing needle and shoot phenology with xylem development on three conifer species in Italy

2009

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Abstract• Since the 1960s biologists have been trying to assess factors affecting cambial activity and latewood formation. A comparison of the phenology of the apical and lateral meristems could add new clues in order to understand mechanisms of the growth dynamic in conifers.• This study compared needle and shoot growth with xylogenesis in Larix decidua, Pinus cembra and Picea abies during 2001 to verify if cambial resumption occurred after shoot and needle growth had begun, and if latewood initiation occurred when shoot lengthening was complete.• In pine and spruce, needle and shoot lengthening was synchronous between mid-June and August while larches showed an early development of the needles at the end of May with a later shoot lengthening. Cell production lasted from mid-May to the beginning of August, with the first differentiating cells observed at the end of May, which indicated a earlier reactivation of the cambium with respect to needle and shoot growth.The first latewood cells began wall thickening between July and August, during the termination of needle and shoot lengthening.• The hypothesis that cambial resumption occurs after shoot and needle elongation was rejected. The separation in time between apical growth and secondary wall thickening of latewood suggested the presence of an internal competition in resource allocation. Mots-clés :cambium / différentiation cellulaire / bois final / microcarotte / limite altitudinale de la forêt Résumé -Comparaison entre la phénologie des aguilles et des pousses et la formation du xylème sur trois espèces de conifère en Italie.• Depuis les années soixante, les biologistes étudient les facteurs contrôlant l'activité cambiale et la formation du bois final. Une comparaison entre la phénologie des méristèmes apicaux et latéraux pourrait ajouter de nouveaux indices afin de mieux comprendre les mécanismes et la dynamique de croissance des conifères.• Cette étude compare la croissance des aiguilles et des nouvelle tiges avec la xylogénèse de trois espèces de conifères, Larix decidua, Pinus cembra et Pices abies dans le but de vérifier si la réacti-vation cambiale survient après la croissance des aiguilles et des nouvelles pousses et si la formation du bois final survient lorsque la croissance des méristèmes apicaux et latéraux est terminée.• Chez le pin et l'épicéa, la croissance des aiguilles et des nouvelles pousses était synchrone, se produisant de la mi-juin jusqu'au début août. Chez le mélèze par contre, le développement des aiguilles a été plus précoce, débutant fin mai avec une croissance différée des tiges latérales. La production cellulaire du cambium a durée de mi-mai jusqu'à début août, avec apparition des premières cellules en différentiation fin mai, indiquant une réactivation plus précoce du cambium que de la croissance des aiguilles et des nouvelles pousses. L'épaississement des parois secondaires chez les premières cellules de bois final a débuté entre juillet et août, à la fin de l'élongation des aiguilles et des nouvelles pousses.• L'hypothèse que l...

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“…Measuring the effect of a single loading on growth requires tools capable of measuring small amounts of growth (especially for diameter growth). The linear voltage differential transducer (LVDT) makes this possible (Daudet et al, 2005;Giovannelli et al, 2007). Using this device, were able to characterize the kinetics of transient elongation cessation after a single stem bending.…”

mentioning

confidence: 99%

Strain Mechanosensing Quantitatively Controls Diameter Growth and PtaZFP2 Gene Expression in Poplar

et al. 2009

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Mechanical signals are important factors that control plant growth and development. External mechanical loadings lead to a decrease in elongation and a stimulation of diameter growth, a syndrome known as thigmomorphogenesis. A previous study has demonstrated that plants perceive the strains they are subjected to and not forces or stresses. On this basis, an integrative biomechanical model of mechanosensing was established ("sum-of-strains model") and tested on tomato (Solanum lycopersicum) elongation but not for local responses such as diameter growth or gene expression. The first aim of this interdisciplinary work was to provide a quantitative study of the effect of a single transitory bending on poplar (Populus tremula 3 alba) diameter growth and on the expression level of a primary mechanosensitive transcription factor gene, PtaZFP2. The second aim of this work was to assess the sum-of-strains model of mechanosensing on these local responses. An original bending device was built to study stem responses according to a controlled range of strains. A single bending modified plant diameter growth and increased the relative abundance of PtaZFP2 transcripts. Integrals of longitudinal strains induced by bending on the responding tissues were highly correlated to local plant responses. The sum-of-strains model of mechanosensing established for stem elongation was thus applicable for local responses at two scales: diameter growth and gene expression.

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Evaluation of drought response of two poplar clones (Populus×canadensis Mönch ‘I-214’ and P. deltoides Marsh. ‘Dvina’) through high resolution analysis of stem growth

Cited by 100 publications

References 44 publications

Stomatal Responses to Drought Stress and Air Humidity

Stomatal Responses to Drought Stress and Air Humidity

Comparing needle and shoot phenology with xylem development on three conifer species in Italy

Strain Mechanosensing Quantitatively Controls Diameter Growth and PtaZFP2 Gene Expression in Poplar

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