Signalling in primary metabolism

Finkemeier, Iris

doi:10.1111/j.1469-8137.2006.01805.x

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…However, Fe deficiency is associated with an accumulation of ROS (Donnini et al, 2011). In addition to ROS, it has been suggested that TCA-cycle intermediates might be potent regulators of gene expression in a manner analogous to sugars (Finkemeier and Sweetlove, 2006;Sweetlove et al, 2007). Indeed, the intermediates of the TCA cycle could communicate the mitochondrial metabolic status to the cytosol by virtue of the presence of di-and tri-carboxylic acid transporter (DTC) proteins located in the inner mitochondrial membrane (Picault et al, 2002).…”

Section: Could Mitochondria Be Involved In the Signal Transduction Ofmentioning

confidence: 99%

Discovering the role of mitochondria in the iron deficiency-induced metabolic responses of plants

Vigani

2012

Journal of Plant Physiology

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In plants, iron (Fe) deficiency-induced chlorosis is a major problem, affecting both yield and quality of crops. Plants have evolved multifaceted strategies, such as reductase activity, proton extrusion, and specialised storage proteins, to mobilise Fe from the environment and distribute it within the plant. Because of its fundamental role in plant productivity, several issues concerning Fe homeostasis in plants are currently intensively studied. The activation of Fe uptake reactions requires an overall adaptation of the primary metabolism because these activities need the constant supply of energetic substrates (i.e., NADPH and ATP). Several studies concerning the metabolism of Fe-deficient plants have been conducted, but research focused on mitochondrial implications in adaptive responses to nutritional stress has only begun in recent years. Mitochondria are the energetic centre of the root cell, and they are strongly affected by Fe deficiency. Nevertheless, they display a high level of functional flexibility, which allows them to maintain the viability of the cell. Mitochondria represent a crucial target of studies on plant homeostasis, and it might be of interest to concentrate future research on understanding how mitochondria orchestrate the reprogramming of root cell metabolism under Fe deficiency. In this review, I summarise what it is known about the effect of Fe deficiency on mitochondrial metabolism and morphology. Moreover, I present a detailed view of the possible roles of mitochondria in the development of plant responses to Fe deficiency, integrating old findings with new and discussing new hypotheses for future investigations.

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Section: Could Mitochondria Be Involved In the Signal Transduction Ofmentioning

confidence: 99%