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Acta Botanica Gallica
Botany Letters
Volume 157, 2010 - Issue 1
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Original Articles

Performance physiologique du génotype autotétraploïde induit de Trigonella foenum-graecum L. comparée aux génotypes diploïdes

, , , , , & show all
Pages 117-126 | Received 21 Jan 2009, Accepted 16 Apr 2009, Published online: 26 Apr 2013
 

Abstract

Polyploid plants are distinguished from diploids by an improved photosynthetic capacity related to the increase of the photosynthetic enzymes and pigments quantities. The aim of this work was to study the physiological performances accompanying the experimental polyploidisation of Trigonella foenum- graecum by comparing the induced autotetraploid, the diploid resulting from the treated plants and the parent. Total chlorophylls content, photosynthesis rate, transpiration rate and stomatal conductance were measured for each genotype. Results showed highly significant variations (p < 0.01) between the different genotypes for the studied physiological characters. PCA and UPGMA method structured the genotypes in two groups. The first group is formed by the autotetraploids and the second is consisted by the parents and the diploids resulting from the treated plants.

Résumé

Les polyploïdes se distinguent souvent des diploïdes par une capacité photosynthétique améliorée liée à l'augmentation de la quantité des enzymes photosynthétiques et des pigments. Ce travail a pour objectif l'étude des performances physiologiques accompagnant la polyploïdisation expérimentale de Trigonella foenum-graecum en comparant les génotypes autotétraploïde induit, diploide issu des plantes traitées et diploide parent. Le contenu en chlorophylles totaux, le taux de photosynthèse, le taux de transpiration et la conductance stomatique ont été mesurés pour chaque génotype. Les résultats montrent des variations hautement significatives (p < 0,01) entre les différents génotypes. L'ACP et la méthode UPGMA ont permis de structurer les génotypes en deux groupes. Le premier groupe est formé par les autotétraploïdes et le deuxième est constitué par les parents et les diploïdes issus des plantes traitées.

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