Articles liés à Genetic Incompatibility in a Biological System: A Study...

Genetic Incompatibility in a Biological System: A Study of the Root Growth Failure in Phaseolus vulgaris - Couverture souple

Mohamed, Sabah

 
9783844318012: Genetic Incompatibility in a Biological System: A Study of the Root Growth Failure in Phaseolus vulgaris
Couverture souple
ISBN 10 : 3844318011 ISBN 13 : 9783844318012
Editeur : LAP LAMBERT Academic Publishing, 2011

Synopsis

This book describes a detailed study of the genetic incompatibility as represented by the DL system in Physiolus vulgaris. The DL system is an excellent representative of the genetic incompatibility between parents of the same species. Specific hybrids between parents of Phaseolus vulgaris from different origins exhibit reduced root growth plus shoot abnormalities in F1 plants and failed root growth in a certain proportion of F2 plants. The phenomenon is attributed to two semi-dominant alleles at two complementary loci, DL1 and DL2, which are expressed in the roots and the shoots respectively. The study showed physiological and anatomical evidences that the inhibitory action of the causative signal from the DL2 shoot that affects the DL1 root is alleviated by external supply of sugars. The sugar effect is suggested to be of a metabolic nature may be via supplying carbohydrates that are required for the growth as well as generating a signal that can antagonise the inhibitory effect to some extent. The inhibitory signal was extracted from the cotyledons of DL2 shoots and its effect was shown on the DL1 roots, which is thought to be through the phloem.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

This book describes a detailed study of the genetic incompatibility as represented by the DL system in Physiolus vulgaris. The DL system is an excellent representative of the genetic incompatibility between parents of the same species. Specific hybrids between parents of Phaseolus vulgaris from different origins exhibit reduced root growth plus shoot abnormalities in F1 plants and failed root growth in a certain proportion of F2 plants. The phenomenon is attributed to two semi-dominant alleles at two complementary loci, DL1 and DL2, which are expressed in the roots and the shoots respectively. The study showed physiological and anatomical evidences that the inhibitory action of the causative signal from the DL2 shoot that affects the DL1 root is alleviated by external supply of sugars. The sugar effect is suggested to be of a metabolic nature may be via supplying carbohydrates that are required for the growth as well as generating a signal that can antagonise the inhibitory effect to some extent. The inhibitory signal was extracted from the cotyledons of DL2 shoots and its effect was shown on the DL1 roots, which is thought to be through the phloem.

Biographie de l'auteur

Dr Sabah Mohamed is a British Egyptian academic who started her academic life at the Faculty of Sciences, Ain Shams University Cairo, Egypt then Joined the School of Biological Sciences at Leeds University. She is trained as a biological scientist with BSc in biology, MSc in physiology and a PhD in genetics. Dr Mohamed now teaches in Britain.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2011
Langue
anglais
ISBN 10 
3844318011
ISBN 13 
9783844318012
Reliure
Broché
Nombre de pages
292
Coordonnées du fabricant
non disponible
Personne responsable
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