Results 231 to 240 of about 14,195 (271)
Some of the next articles are maybe not open access.
Phloem loading—not metaphysical, only complex: towards a unified model of phloem loading
Journal of Experimental Botany, 1996Phloem loading comprises the entire pathway of phloem-mobile solutes from their place of generation (or delivery) to the sieve tubes in a sequence of transport steps across or passing by several different cell types. Each of these steps can be classified as symplastic or apoplastic.
E, Komor +3 more
openaire +2 more sources
Oxygen effects on phloem loading
Plant Science Letters, 1979Abstract In vivo observations were made of phloem loading using 11 CO 2 . Changes in the rate of loading were inferred from changes in the rate of export of tracer from the fed area of a leaf, since transport speeds were observed not to change. Loading in wheat and Panicum miliodes was reduced by approx.
M.R. Thorpe, P.E.H. Minchin, E.A. Dye
openaire +1 more source
Phloem loading, plant growth form, and climate
Protoplasma, 2010Plasmodesmatal frequencies in the phloem of leaf minor veins vary considerably, suggesting that photoassimilate is loaded into the phloem by different strategies. The ecophysiological basis for multiple loading types is unknown. We updated the analysis of van Bel and Gamalei (Plant Cell Environ 15: 265-270, 1992) with more current phylogenetic data and
Anna, Davidson +2 more
openaire +2 more sources
Phloem loading in peach: Symplastic or apoplastic?
Physiologia Plantarum, 1997Sorbitol and sucrose are the two main soluble carbohydrates in mature peach leaves. Both are translocated in the phloem, in peach as in other rosaceous trees. The respective role of these two soluble carbohydrates in the leaf carbon budget, and their phloem loading pathway, remain poorly documented.
Moing, Annick +4 more
openaire +2 more sources
Annual Review of Plant Physiology and Plant Molecular Biology, 1993
CONTENTS INTRODUCTION 253 DEFINITION OF STEVE ELEMENT LOADING AND PHLOEM LOADING 254 ULTRASTRUCTURE OF THE SIEVE ELEMENT LOADING ZONE ... 255 STRUCTURE OF THE PHLOEM LOADING ZONE 256 LOADING AND TRANSPORT SECTIONS OF THE PHLOEM IN THE VEIN SYSTEM. 258 POTENTIAL PATHWAYS OF PHLOEM LOADING .. , ,.........
openaire +1 more source
CONTENTS INTRODUCTION 253 DEFINITION OF STEVE ELEMENT LOADING AND PHLOEM LOADING 254 ULTRASTRUCTURE OF THE SIEVE ELEMENT LOADING ZONE ... 255 STRUCTURE OF THE PHLOEM LOADING ZONE 256 LOADING AND TRANSPORT SECTIONS OF THE PHLOEM IN THE VEIN SYSTEM. 258 POTENTIAL PATHWAYS OF PHLOEM LOADING .. , ,.........
openaire +1 more source
Annual Review of Plant Physiology, 1983
Autoradiographic, plasmolysis, and 14 C-metabolite distribution studies indicate that the majority of exogenously supplied 14 C-sucrose enters the phloem directly from the apoplast in source leaf discs of Beta vulgaris . Phloem loading of sucrose is pH-dependent, being markedly inhibited at an apoplast pH of 8 compared to pH 5.
openaire +1 more source
Autoradiographic, plasmolysis, and 14 C-metabolite distribution studies indicate that the majority of exogenously supplied 14 C-sucrose enters the phloem directly from the apoplast in source leaf discs of Beta vulgaris . Phloem loading of sucrose is pH-dependent, being markedly inhibited at an apoplast pH of 8 compared to pH 5.
openaire +1 more source
Studying Phloem Loading with EDTA-Facilitated Phloem Exudate Collection and Analysis
2019Sugars that are produced by photosynthesis in the leaves are transported in the phloem to heterotrophic sink tissues like roots, fruit, or flowers. Since sugars inside the highly specialized cells of the phloem move by bulk flow, it is the loading and unloading of sugars that determines the rates of allocation between organs.
Qiyu, Xu +2 more
openaire +2 more sources
1975
Localized application of chemicals which inhibit metabolism, anoxia and low temperature have been used as tools in basic research to assess the role of energy metabolism in the various stages of the translocation process. The results of these studies are reviewed in this chapter.
openaire +1 more source
Localized application of chemicals which inhibit metabolism, anoxia and low temperature have been used as tools in basic research to assess the role of energy metabolism in the various stages of the translocation process. The results of these studies are reviewed in this chapter.
openaire +1 more source
Effect of SO2 on phloem loading
Plant Science, 1986Abstract Phloem loading, measured in vivo using carbon-11, is shown to be immediately reduced when SO 2 is applied to a leaf of a C 3 plant, but no immediate effect is seen on a C 4 plant. This C 3 -C 4 difference is similar to that seen with anoxia, and it is proposed that it is associated with the different anatomical structures in the vicinity
P.E.H. Minchin, R. Gould
openaire +1 more source