<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Flower development and senescence was studied in <italic>Narcissus tazetta</italic> ‘Kashmir Local’. Flower development was divided into six stages (I-VI), from the tight bud stage to the senescent stage. Flower fresh and dry weight increased as the flowers progressed from bud to bloom and then declined during senescence. Membrane permeability of tepal tissues increased as the flower progressed through various stages. The content of sugars (reducing and total) increased during flower development and declined thereafter during senescence. The α-amino acid content registered an increase during flower development with a concomitant decrease in soluble protein content. The SDS-PAGE of protein extracts from tepal tissues revealed a general decrease in the expression of some high molecular weight proteins and an increase in low molecular weight proteins during flower development and senescence. It may be suggested that the flower senescence of <italic>N. tazetta</italic> may be linked to the protein turnover and sugar status of the perianth tissues and that these newly synthesized proteins may be involved in proteolysis. At this stage, it is not known whether these polypeptides play an important role in senescence but revealing the nature of these proteins can provide new insights into the pathways executing senescence in this flower system.</p></abstract>

Flower development and senescence was studied in Narcissus tazetta ‘Kashmir Local’. Flower development was divided into six stages (I-VI), from the tight bud stage to the senescent stage. Flower fresh and dry weight increased as the flowers progressed from bud to bloom and then declined during senescence. Membrane permeability of tepal tissues increased as the flower progressed through various stages. The content of sugars (reducing and total) increased during flower development and declined thereafter during senescence. The α-amino acid content registered an increase during flower development with a concomitant decrease in soluble protein content. The SDS-PAGE of protein extracts from tepal tissues revealed a general decrease in the expression of some high molecular weight proteins and an increase in low molecular weight proteins during flower development and senescence. It may be suggested that the flower senescence of N. tazetta may be linked to the protein turnover and sugar status of the perianth tissues and that these newly synthesized proteins may be involved in proteolysis. At this stage, it is not known whether these polypeptides play an important role in senescence but revealing the nature of these proteins can provide new insights into the pathways executing senescence in this flower system.

Flower development and senescence in <italic>Narcissus tazetta</italic> ‘Kashmir Local’

Plant Physiology and Biochemistry Research Laboratory

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Flower development and senescence in  ‘Kashmir Local’

Flower development and senescence was studied in Narcissus tazetta ‘Kashmir Local’. Flower development was divided into six stages (I-VI), from the tight bud...

Flower development and senescence in Narcissus tazetta ‘Kashmir Local’

Publié en ligne: 30 déc. 2015

Pages: 115 - 121

Reçu: 07 juin 2015

Accepté: 30 août 2015

DOI: https://doi.org/10.1515/fhort-2015-0021

Mots clés
α-amino acids, flower, membrane permeability, SDS-PAGE, senescence, soluble proteins

© 2015 Fahima Gul et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Flower development and senescence in Narcissus tazetta ‘Kashmir Local’

Publié en ligne: 30 déc. 2015

Pages: 115 - 121

Reçu: 07 juin 2015

Accepté: 30 août 2015

DOI: https://doi.org/10.1515/fhort-2015-0021

Mots clésα-amino acids, flower, membrane permeability, SDS-PAGE, senescence, soluble proteins

© 2015 Fahima Gul et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
α-amino acids, flower, membrane permeability, SDS-PAGE, senescence, soluble proteins