Results 221 to 230 of about 14,107 (256)

Transport in the Phloem

1976
A multicellular plant with specialised organs can only function effectively if it has an organised transport system. The over-all nutrition and growth of a plant may depend as much on the efficient transfer of nutrients between its component parts as it does on their total synthesis or uptake.
C. Marshall, G. R. Sagar
openaire   +1 more source

Measuring Phloem Transport Velocity on a Tissue Level Using a Phloem-Mobile Dye

2019
Here we describe an in vivo dye-tracking method for measuring phloem transport velocity in seedlings, leaves and petioles and potentially other translucent plant tissues. The method requires measurement of the fluorescent signal of a phloem-mobile fluorescent dye using sensitive photo-sensors placed external to the plant.
Jessica A, Savage, Maciej A, Zwieniecki
openaire   +2 more sources

Ecophysiological Aspects of Phloem Transport in Trees

2014
The primary function of the phloem is the transport of assimilate products from mature leaves to other tissues. Here we examine this function from a whole tree perspective and relate it to assimilate production, tree water relations, and tree structure.
Teemu Hölttä, Maurizio Mencuccini, Eero Nikinmaa   +2 more
openaire   +1 more source

Scaling phloem transport: Elasticity and pressure–concentration waves

Journal of Theoretical Biology, 2005
Earlier theoretical analyses of the rate of propagation of pressure-concentration waves in the phloem were performed without adequate attention to the elastic expansion of sieve tube walls. Here, it is shown that the rate of propagation of pressure-concentration waves in phloem sieve tubes is not significantly impeded by wall elasticity, but rather, as
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SWEET sugar transporters for phloem transport and pathogen nutrition

New Phytologist, 2013
SummaryMany intercellular solute transport processes require an apoplasmic step, that is, efflux from one cell and subsequent uptake by an adjacent cell. Cellular uptake transporters have been identified for many solutes, including sucrose; however, efflux transporters have remained elusive for a long time.
openaire   +2 more sources

Making Microfluidic Devices that Simulate Phloem Transport

2019
Phloem tissues are exquisitely difficult to probe experimentally. The biomimetic approach based on synthetic phloem devices might prove useful by allowing to uncover the dynamics and physicochemical couplings of the phloem. In this chapter we discuss the design of a synthetic microfluidic device simulating phloem transport, and the importance of such a
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Phloem transport in Ricinus

Pesticide Science, 1972
AbstractRecently, Ricinus has been used extensively to investigate the mechanism of phloem transport. This work is reviewed. In many respects, both anatomically and physiologically, Ricinus seems to approach the ideal for work on phloem physiology. Its anatomy is typical of many plants so that valid comparisons can probably be drawn with other species.
openaire   +1 more source

Phloem Transport: Physical Chemical or Impossible

Annual Review of Plant Physiology, 1974
CHARACTERISTICS OF THE CONDUCTING SIEVE ELEMENTS., 516 Sieve Tube Fine Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517 Tissue Fixation and Turgor Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517 Nature and Properties of Fine Structure . . . . . . . .
openaire   +1 more source

Cell-by-cell dissection of phloem development links a maturation gradient to cell specialization

Science, 2021
Pawel Roszak, Jungok Heo, Bernhard Blob
exaly  

Distinct identities of leaf phloem cells revealed by single cell transcriptomics

Plant Cell, 2021
Ji-Yun Kim, Tin Yau Pang, Tom Denyer
exaly