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Is the Responsiveness to Light Related to the Differences in Stem Straightness among Populations of Pinus pinaster?
- Source :
- Plants, Plants, MDPI, 2019, 8 (10), 15 p, Volume 8, Issue 10, Plants 10 (8), 15 p.. (2019), Plants, Vol 8, Iss 10, p 383 (2019), UVaDOC. Repositorio Documental de la Universidad de Valladolid, instname
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- Producción Científica<br />Stem straightness is related to wood quality and yield. Although important genetic differences in stem straightness among the natural populations of Pinus pinaster are well established, the main drivers of these differences are not well known. Since the responses of trees to light are key ecological features that induce stem curvature, we hypothesized that populations with better straightness should exhibit lower photomorphogenetic and phototropic sensitivity. We compared three populations to identify the main processes driven by primary and secondary growth that explain their differences in response to light. One-year-old seedlings were grown under two treatments—direct sunlight and lateral light plus shade—for a period of 5 months. The length and the leaning of the stems were measured weekly. The asymmetry of radial growth and compression wood (CW) formation were analyzed in cross-sections. We found differences among the populations in photomorphogenetic and phototropic reactions. However, the population with straighter stems was not characterized by reduced sensitivity to light. Photo(gravi)tropic responses driven by primary growth and gravitropic responses driven by secondary growth explained the kinetics of the stem leaning and CW pattern. Asymmetric radial growth and CW formation did not contribute to the phototropic reactions.<br />Comisión Interministerial de Ciencia y Tecnología (projects AGF97-0809 and AGL2004-07094-C02-02)
- Subjects :
- 0106 biological sciences
0301 basic medicine
compression wood
gravitropism
photomorphogenesis
phototropism
stem straightness
Photomorphogenesis
Secondary growth
Population
phototropisme
Compression wood
Plant Science
01 natural sciences
Article
Fototropismo
Gravitropism
03 medical and health sciences
Fotomorfogénesis
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
Phototropism
education
Ecology, Evolution, Behavior and Systematics
photomorphogénèse
education.field_of_study
Vegetal Biology
Ecology
biology
Botany
15. Life on land
biology.organism_classification
Horticulture
030104 developmental biology
Radial growth
Gravitropismo
QK1-989
rectitude de la tige
Pinus pinaster
gravitropisme
bois de compression
Biologie végétale
Madera de compresión
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 20040709 and 22237747
- Database :
- OpenAIRE
- Journal :
- Plants, Plants, MDPI, 2019, 8 (10), 15 p, Volume 8, Issue 10, Plants 10 (8), 15 p.. (2019), Plants, Vol 8, Iss 10, p 383 (2019), UVaDOC. Repositorio Documental de la Universidad de Valladolid, instname
- Accession number :
- edsair.doi.dedup.....62f5894edfd0e783efac5f750d5eb376