Spatial and temporal distribution of mineral nutrients and sugars throughout the lifespan of Hibiscus rosa-sinensis L. flower
Articolo
Data di Pubblicazione:
2011
Citazione:
Spatial and temporal distribution of mineral nutrients and sugars throughout the lifespan of Hibiscus rosa-sinensis L. flower / A. Trivellini, A. Ferrante, P. Vernieri, G. Carmassi, G. Serra. - In: CENTRAL EUROPEAN JOURNAL OF BIOLOGY. - ISSN 1895-104X. - 6:3(2011), pp. 365-375.
Abstract:
Although the physiological and molecular mechanisms of flower development and senescence have been extensively investigated,
a whole-flower partitioning study of mineral concentrations has not been carried out. In this work, the distribution of sucrose, total
reducing sugars, dry and fresh weight and macro and micronutrients were analysed in Hibiscus rosa-sinensis L. petals, stylestigma
including stamens and ovary at different developmental stages (bud, open and senescent flowers). Total reducing sugars
showed the highest value in petals of bud flowers, then fell during the later stages of flower development whereas sucrose showed
the highest value in petals of senescent flowers. In petals, nitrogen and phosphorus content increased during flower opening,
then nitrogen level decreased in senescent flowers. The calcium, phosphorus and boron concentrations were highest in ovary
tissues whatever the developmental stage. Overall, the data presented suggests that the high level of total reducing sugars prior
the onset of flower opening contributes to support petal cells expansion, while the high amount of sucrose at the time of petal
wilting may be viewed as a result of senescence. Furthermore, this study discusses how the accumulation of particular mineral
nutrients can be considered in a tissue specific manner for the activation of processes directly connected with reproduction.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Flower parts ; Reducing sugars ; Sucrose ; Micronutrients ; Macronutrients ; Flower senescence ; Remobilization ; Osmoregulation
Elenco autori:
A. Trivellini, A. Ferrante, P. Vernieri, G. Carmassi, G. Serra
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