Silverleaf whitefly stress impairs sugar export from cotton source leaves

Lin, Tong-Bao; Wolf, Shmuel; Schwartz, Amnon; Saranga, Yehoshua

doi:10.1034/j.1399-3054.2000.100310.x

Cited by 20 publications

(16 citation statements)

References 33 publications

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“…Crucially, these symptoms were not observed in resistant lines. Other experiments using 14 CO 2 labelling have confirmed that cotton leaves export less fixed carbon following infestation by the phloem‐feeding silverleaf whitefly and that soluble sugars accumulated in leaves, which further supports the hypothesis regarding the role of feedback inhibition of photosynthesis (Lin et al . 2000).…”

Section: Insect Herbivory Impacts Primary Metabolic Processessupporting

confidence: 79%

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Kerchev

Fenton

Foyer

et al. 2011

Plant Cell & Environment

299

184

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Under herbivore attack plants mount a defence response characterized by the accumulation of secondary metabolites and inhibitory proteins. Significant changes are observed in the transcriptional profiles of genes encoding enzymes of primary metabolism. Such changes have often been interpreted in terms of a requirement for an increased investment of resources to 'fuel' the synthesis of secondary metabolites. While enhanced secondary metabolism undoubtedly exerts an influence on primary metabolism, accumulating evidence suggests that rather than stimulating photosynthesis insect herbivory reduces photosynthetic carbon fixation and this response occurs by a re-programming of gene expression. Within this context, reactive oxygen species (ROS) and reductant/oxidant (redox) signalling play a central role. Accumulating evidence suggests that ROS signalling pathways are closely interwoven with hormone-signalling pathways in plant-insect interactions. Here we consider how insect infestation impacts on the stress signalling network through effects on ROS and cellular redox metabolism with particular emphasis on the roles of ROS in the plant responses to phloem-feeding insects.

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Section: Insect Herbivory Impacts Primary Metabolic Processessupporting

confidence: 79%

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Kerchev

Fenton

Foyer

et al. 2011

Plant Cell & Environment

299

184

View full text Add to dashboard Cite

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“…The latter has been shown for silverleaf whitefly infestations, whose feeding on leaves caused reduced photosynthate export from source tissues (Lin et al, 2000). Also, the flower should be an example sink tissue.…”

Section: Discussionmentioning

confidence: 86%

Influence of Green Leaf Herbivory by Manduca sexta on Floral Volatile Emission by Nicotiana suaveolens

2008

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Plants have to cope with various abiotic and biotic impacts as a consequence of changing environments, which can impair their ability to sexually reproduce. The main objective of this study was to investigate whether green leaf herbivory, having one of the most hazardous biotic impacts, would have any direct effect on the production and emission of floral volatiles because volatiles are known to play a crucial role in pollination. Nicotiana suaveolens plants were challenged with Manduca sexta feeding on leaves, and alterations in the quality and quantity of the floral blend, shifts in emission patterns, and changes in expression patterns of the floral benzoic/salicylic acid carboxyl-methyltransferase were monitored in noninfested and infested plants. Leaves responded to larval feeding by herbivory-induced diurnal emission of semiochemicals, whereas the emission of floral volatiles remained unchanged in comparison to the noninfested control. Neither the volatile composition nor the quantity of components or the nocturnal emission patterns was altered. The mRNA and protein levels of the benzoic/salicylic acid carboxylmethyltransferase, as well as its enzyme activity, also did not show any significant differences. These results indicate that metabolism in flowers at and postanthesis is an autonomous process and is independent of metabolic changes in green leaves. By this sustaining mechanism, N. suaveolens plants ensure sexual reproduction even under unfavorable conditions.

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“…Petiole glucose levels were significantly correlated with densities of whitefly adults during the peak population size (Table 1). Whiteflies are known to impair photoassimilate export from leaves (Lin et al, 2000) which could lead to elevated glucose in leaf petioles. So, the correlation between glucose and whitefly numbers may be due to other factors.…”

Section: Discussionmentioning

confidence: 99%

Effect of cotton nitrogen fertilization on Bemisia argentifolii populations and honeydew production

Ballmer

Hendrix³

et al. 2001

Entomologia Exp Applicata

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The impact of nitrogen fertilization on cotton plants, Gossypium hirsutum L., silverleaf whitefly, Bemisia argentifolii Bellows & Perring, population dynamics and honeydew production were investigated in the field at Riverside, California, USA. Treatments were soil applications of 0, 112, 168 and 224 kg nitrogen per hectare, and a soil application of 112 kg of nitrogen plus a foliar application of 17 kg nitrogen per hectare. Increased numbers of both adult and immature whiteflies occurred during population peaks with increasing amounts of applied nitrogen. Higher numbers of whiteflies resulted in increased levels of honeydew. Increasing plant nitrogen also enhanced cotton foliar photosynthetic rates and stomatal conductance, and altered concentrations of glucose, fructose and sucrose in cotton petioles. However, at our treatment levels nitrogen had no effect on seedcotton yield. Petiole glucose levels were significantly correlated with numbers of whitefly adults on leaves during their peak populations. Significant correlations between whitefly numbers and other cotton physiological parameters occurred on only a few sampling dates.

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Silverleaf whitefly stress impairs sugar export from cotton source leaves

Cited by 20 publications

References 33 publications

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Influence of Green Leaf Herbivory by Manduca sexta on Floral Volatile Emission by Nicotiana suaveolens

Effect of cotton nitrogen fertilization on Bemisia argentifolii populations and honeydew production

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