The impact of prolonged drought on phloem anatomy and phloem transport in young beech trees
Tree Physiology, 2018 Phloem failure has recently been recognized as one of the mechanisms causing tree mortality under drought, though direct evidence is still lacking. We combined 13C pulse-labelling of 8-year-old beech trees (Fagus sylvatica L.) growing outdoors in a nursery with an anatomical study of the phloem tissue in their stems to examine how drought alters carbon
Dannoura, Masako +7 more
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Post-phloem transport: principles and problems
Journal of Experimental Botany, 1996 The movement of assimilates from the sieve element/companion cell complex to sites of utilization has been examined in an extensive array of sinks possessing diverse anatomies. This work has been reviewed with respect to the pathways taken, the conductances and driving forces for movement along the pathways, and interaction between the apoplast and ...
D B, Fisher, K J, Oparka
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Low Night Temperature Affects the Phloem Ultrastructure of Lateral Branches and Raffinose Family Oligosaccharide (RFO) Accumulation in RFO-Transporting Plant Melon (Cucumismelo L.) during Fruit Expansion. [PDF]
PLoS ONE, 2016 Due to the importance and complexity of photo assimilate transport in raffinose family oligosaccharide (RFO)-transporting plants such as melon, it is important to study the features of the transport structure (phloem) particularly of the lateral branches
Jinghong Hao +9 more
doaj +1 more source
Transport of sucrose, not hexose, in the phloem [PDF]
Journal of Experimental Botany, 2012 Several lines of evidence indicate that glucose and fructose are essentially absent in mobile phloem sap. However, this paradigm has been called into question, especially but not entirely, with respect to species in the Ranunculaceae and Papaveraceae. In the experiments in question, phloem sap was obtained by detaching leaves and placing the cut ends ...
Liu, David D. +2 more
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Molecular Plant-Microbe Interactions, 2006 The systemic movement of Cucumber mosaic virus (CMV) in cucumber plants was analyzed. The structure that is translocated and its putative interactions with phloem components were analyzed in phloem exudate (PE) samples, which reflect sieve tubes stream ...
A. Requena +3 more
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Phloem transport of flowering signals [PDF]
Current Opinion in Plant Biology, 2008 Seasonal variability in environmental parameters such as day length regulates many aspects of plant development. The transition from vegetative growth to flowering in Arabidopsis is regulated by seasonal changes in day length through a genetically defined molecular cascade known as the photoperiod pathway. Recent advances were made in understanding the
Giakountis, A., Coupland, G.
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Root phloem-specific expression of the plasma membrane amino acid proton co-transporter AAP3 [PDF]
, 2004 Amino acids are regarded as the nitrogen ‘currency’ of plants. Amino acids can be taken up from the soil directly or synthesized from inorganic nitrogen, and then circulated in the plant via phloem and xylem.
Sakiko Okumoto +28 more
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Source to sink transport and regulation by environmental factors
Frontiers in Plant Science, 2013 Source-to-sink transport of sugar is one of the major determinants of plant growth and relies on the efficient and controlled distribution of sucrose (and some other sugars such as raffinose and polyols) across plant organs through the phloem.
Remi eLemoine +14 more
doaj +1 more source
Quantification of plasmodesmatal endoplasmic reticulum coupling between sieve elements and companion cells using fluorescence redistribution after photobleaching [PDF]
, 2006 Transgenic tobacco (Nicotiana tabacum) was studied to localize the activity of phloem loading during development and to establish whether the endoplasmic reticulum (ER) of the companion cell (CC) and the sieve element (SE) reticulum is continuous by ...
Roberts, Alison G. +6 more
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A mutation in amino acid permease AAP6 reduces the amino acid content of the Arabidopsis sieve elements but leaves aphid herbivores unaffected [PDF]
, 2010 The aim of this study was to investigate the role of the amino acid permease gene AAP6 in regulating phloem amino acid composition and then to determine the effects of this altered diet on aphid performance.
Newbury, H. J. +6 more
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