Role of sucrose synthase and invertases during petal senescence in rose (<i>Rosa hybrida</i>L.)

Kumar, Naveen; Srivastava, G. C.; Dixit, Kiran

doi:10.1080/14620316.2008.11512416

Cited by 14 publications

(10 citation statements)

References 36 publications

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“…Also in rose petals AI (soluble and cell wall-bound) activities are higher than NI activities and increase during flower development. Increasing SUS activity was also detected in rose petals, though its activity was weak compared to the invertase activity ( Yamada et al, 2007 ; Kumar et al, 2008a ; Horibe et al, 2013 ). We could not detect SUS activity despite the expression of RsSUS in the petals.…”

Section: Discussionmentioning

confidence: 92%

Suboptimal Light Conditions Influence Source-Sink Metabolism during Flowering

Christiaens

Keyser²,

Pauwels³

et al. 2016

Front. Plant Sci.

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Reliance on carbohydrates during flower forcing was investigated in one early and one late flowering cultivar of azalea (Rhododendron simsii hybrids). Carbohydrate accumulation, invertase activity, and expression of a purported sucrose synthase gene (RsSUS) was monitored during flower forcing under suboptimal (natural) and optimal (supplemental light) light conditions, after a cold treatment (7°C + dark) to break flower bud dormancy. Post-production sucrose metabolism and flowering quality was also assessed. Glucose and fructose concentrations and invertase activity increased in petals during flowering, while sucrose decreased. In suboptimal light conditions RsSUS expression in leaves increased as compared to optimal light conditions, indicating that plants in suboptimal light conditions have a strong demand for carbohydrates. However, carbohydrates in leaves were markedly lower in suboptimal light conditions compared to optimal light conditions. This resulted in poor flowering of plants in suboptimal light conditions. Post-production flowering relied on the stored leaf carbon, which could be accumulated under optimal light conditions in the greenhouse. These results show that flower opening in azalea relies on carbohydrates imported from leaves and is source-limiting under suboptimal light conditions.

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Section: Discussionmentioning

confidence: 92%

Suboptimal Light Conditions Influence Source-Sink Metabolism during Flowering

Christiaens

Keyser²,

Pauwels³

et al. 2016

Front. Plant Sci.

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“…In addition, invertase activities in the petals of attached rose flowers increased markedly during petal growth but not in cut roses, even in cut roses treated with sucrose ). On the other hand, sucrose synthase activity is weaker than acid invertase activities in rose petals (Kumar et al 2008), suggesting that sugars appear to be transported at least partly through apoplastic unloading in rose petals. Thus, high glucose and fructose concentrations in the apoplast may be due to the transport of these carbohydrates through the apoplast ).…”

Section: Function Of Sugar Metabolizing Proteins During Flower Openingmentioning

confidence: 93%

Petal Growth Physiology of Cut Rose Flowers: Progress and Future Prospects

Horibe

Yamada

2017

Journal of Horticultural Research

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Roses are the most important crop in the floriculture industry and attract both pollinators and human admirers. Until now, a lot of research focusing on postharvest physiology including flower senescence has been conducted, leading to improvement in vase life. However, few studies have focused on the physiology of petal growth, the perception of light by petals, and the relationship between petal growth and environmental conditions. Regarding roses, whose ornamental value lies in the process of blooming from buds, it is also important to understand their flowering mechanisms and establish methods to control such mechanisms, as well as focus on slowing the aging process, in order to achieve high quality of postharvest cut roses. Elucidation of the mechanisms of rose flower opening would contribute to enhanced quality and commercial production of floricultural crops as well as greatly advance basic scientific knowledge regarding plant biology. In this review, we describe the progress and future prospects in the study of petal growth physiology of cut roses.

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“…1. The increase of glucose and fructose concentrations in petals has been observed in many species, such as rose, lily, and tulips (Kumar et al, 2008). Moreover, the content of key enzymes associated with flower initiation increases with sucrose, and the balance of source production and sink strength of carbon is a key factor in flower development (Rold an et al, 1999).…”

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confidence: 99%

Determining the Relationship between Floral Initiation and Source–Sink Dynamics of Tomato Seedlings Affected by Changes in Shading and Nutrients

Wang¹,

Gui²,

Zhao³

et al. 2020

horts

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Floral initiation is an important transition point from vegetative growth to reproductive growth in tomatoes and is known to be affected by light intensity, temperature, and nutrients. However, the regulation between flower formation and environmental factors, including nutrient conditions, due to source–sink dynamics (supply and demand of photoassimilates) is seldom documented. To evaluate the effects of light intensity and nutrition conditions on prefloral formation and development, dynamic floral characteristics during development were fitted with sigmoidal logistic curves under four light treatments with shading nets in two nutrient conditions. Source activity and sink strength were altered, which caused differences in the floral positions, length of floral shoots, floral initiation dates, and leaf numbers under the different treatments. Accumulated light acts upstream of nutrition supply during the formation of buds and leads to the accumulation of carbohydrates in source organs. Leaf area reached ≈500 cm2, and dry matter weights reached ≈3 g in each treatment until the flowering day, revealing that some level of photoassimilates are necessary for floral initiation. Both days to flowering and bud number were highly correlated with daily light integral (DLI) from 6 to 12 days before anthesis, which means this period is important for anthesis in tomato. Our results highlight regulation of the transition from vegetative growth to reproductive growth by tomato seedlings due to environmental factors and nutrients. A better understanding of communication between source organs and sink organs during floral initiation response to different environments is expected to provide management strategies for greenhouse tomato production.

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Role of sucrose synthase and invertases during petal senescence in rose (Rosa hybridaL.)

Cited by 14 publications

References 36 publications

Suboptimal Light Conditions Influence Source-Sink Metabolism during Flowering

Suboptimal Light Conditions Influence Source-Sink Metabolism during Flowering

Petal Growth Physiology of Cut Rose Flowers: Progress and Future Prospects

Determining the Relationship between Floral Initiation and Source–Sink Dynamics of Tomato Seedlings Affected by Changes in Shading and Nutrients

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