2 edition of Photosynthate translocation and bioelectric potentials. found in the catalog.
Photosynthate translocation and bioelectric potentials.
Perry Alexander Cockburn
Written in English
|Contributions||Toronto, Ont. University.|
|LC Classifications||LE3 T525 MSA 1961 C63|
|The Physical Object|
|Number of Pages||60|
where Ψ s, Ψ p, Ψ g, and Ψ m refer to the solute, pressure, gravity, and matric potentials, respectively. “System” can refer to the water potential of the soil water (Ψ soil), root water (Ψ root), stem water (Ψ stem), leaf water (Ψ leaf) or the water in the atmosphere (Ψ atmosphere): whichever aqueous system is under the individual components change, they raise or. Translocation of photoassimilates occur in phloem which can be functionally characterized into three different zones along the source-to-sink pathway (Fig. ).At the sources, these are often referred as collection phloem, while at the sinks, these are termed as release connecting pathways of the two are known as transport of photoassimilates from all .
DEPARTURES: PHLOEM LOADING AT THE SE-CC COMPLEX. The structure of minor veins varies considerably with species, suggesting that the routes and mechanisms of solute transfer into the phloem of leaves are equally diverse (Gamalei, ; van Bel, ; Grusak et al., ; Komor et al., ; Turgeon, ).The final transport step into the SE-CC complex, either from the apoplast or the . van der Eoorten, G., , Characteristics of gas exchange, grain growth and leaf nitrogen in some selected wheat cultivars of different yield potentials, thesis, university of Guelph. Google Scholar.
where Ψ s, Ψ p, Ψ g, and Ψ m refer to the solute, pressure, gravity, and matric potentials, respectively. “System” can refer to the water potential of the soil water (Ψ soil), root water (Ψ root), stem water (Ψ stem), leaf water (Ψ leaf) or the water in the atmosphere (Ψ atmosphere): whichever aqueous system is under the individual components change, they raise or. BIOELECTRIC GRADIENTS HAVE DISTINCT, AUTONOMOUS DYNAMICS. Bioelectric patterns are clearly important drivers of cell behavior and pattern formation, but how do these patterns originate? Diverse resting potentials across a tissue can arise from preexisting differences in ion channel transcription, but that is not the only way (Justet et al., ).
Views from a ferris wheel
At a Great and General Court or Assembly, holden at Boston by several prorogations & adjournment, unto Wednesday, March, 14th. 1710 [new style, 1711].
Art. XIV.--On the effect of the physical geography of the world on the boundaries of empires
Lal Ded in my view
Clouds Hill, Dorset
Young Entrepreneurs Guide to Creating What Matters Most
Low temperature physics
I in independent study.
London missionary society jubilee pageant, 150 years of missionary enterprise
A TESOL professional anthology
The pattern of photosynthate flow changes as the plant grows and develops. Photosynthates are directed primarily to the roots early on, to shoots and leaves during vegetative growth, and to seeds and fruits during reproductive development.
They are also directed to tubers for storage. Translocation: Transport from Source to Sink. respiration, photosynthesis, transpiration, translocation of photosynthate from shoots to roots, and bio-electric Photosynthate translocation and bioelectric potentials.
book between the tip and the base of a stem were measured throughout the growing season from April to October At both moisture levels the lowest translocation of recent photosynthate from.
PART I White pine seedlings (Pinus strobus L.) were grown at high or low soil-moisture levels. The leader stem length, fresh weight of the seedlings, respiration, photosynthesis, transpiration, translocation of photosynthate from shoots to roots, and bio-electric potentials between the tip and the base of the stem were measured throughout the growing season from April to October.
Therefore, a lack of photosynthate rather than a blockage of translocation may have caused the failure in grain development when low ψ W were present at anthesis.
Citing Literature Vol Issue 5Cited by: transpiration, translocation of photosynthate from shoots to roots, and bio-electric potentials between the tip and the base of the stem were measured throughout the growing season from April to October.
At both moisture levels the lowest translocation of recent photosynthate. A 14 C translocation study confirmed that grain fill drew on stored photosynthate to a greater extent in desiccated plants than in controls.
Because of this redistribution of photosynthate, grain yield was related to the total dry matter accumulated by the plants during the growing by: The increase in the length and in the fresh weight of seedlings, respiration, photosynthesis, transpiration, translocation of photosynthate from shoots to roots, and bio-electric potentials.
Abstract. PART I White pine seedlings (Pinus strobus L.) were grown at high or low soil-moisture levels. The leader stem length, fresh weight of the seedlings, respiration, photosynthesis, transpiration, translocation of photosynthate from shoots to roots, and bio-electric potentials between the tip and the base of the stem were measured throughout the growing season from April to October.
In biology, developmental bioelectricity refers to the regulation of cell, tissue, and organ-level patterning and behavior as the result of endogenous electrically-mediated and tissues of all types use ion fluxes to communicate electrically.
The charge carrier in bioelectricity is the ion (charged atom), and an electric current and field is generated whenever a net ion flux occur.
Methods used for studying this problem in cereals included the removal of leaves of different insertion positions, leaf or ear shading, studying the structure of photosynthetic potentials, etc. The surface of all photosynthesizing organs (including the stalk and the ear) was often measured for this purpose (KUMAKOV ).
Measuring membrane potentials through cut aphid stylets yielded membrane potentials of − mV in Salix (Wright and Fisher, ) and − mV in Mimosa (Fromm and Eschrich, ) sieve tubes.
SE membrane potentials measured in slices of phloem tissue were in the order of − mV for S. lycopersicum (van der Schoot and van Bel, ). Apetiolar transport of photosynthate −14 C has been studied by feeding of 14 CO 2 to soybean petioles.
Translocation occurs in the absence of leaves, but both the rate and velocity are diminished. The effect of root excision is not as profound as that of leaves. It appears, in some instances, to inhibit transport partially, so that. The translocation amount and rate of vegetative organ photosynthate before silking were respectively increased by and % in YN7 and and % in SYN5, and the contribution rate to grain yield increased by and % in YN7 and SYN5, respectively.
Cotton plants subjected to a series of water deficits exhibited stress adaptation in the form of osmoregulation when plants were subjected to a subsequent drying cycle. After adaptation, the leaf water potential coinciding with zero turgor was considerably lower than in plants that had never experienced a water stress.
The relationship between leaf turgor and leaf water potential depended on. Kinetics of photosynthate translocation Donald Boyd Fisher Iowa State University Follow this and additional works at: Part of theBiochemistry Commons, and theBotany Commons This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State.
the bioelectric potentials of plants and their functional significance: v. some daily and seasonal changes in the electrical potential and resistance of living trees D. Fensom» Abstract. The effect of drought on the fixation and translocation of labelled carbon in the potato (S.
tuberosum) was examined. Low leaf water potentials resulted in a decrease in translocation which was proportional to the decline in net photosynthesis, irrespective of whether tubers were absent or present.
The ratio of 14C entering polysaccharides to that in ethanol-soluble compounds markedly. Pressure potentials are typically around – MPa, but can reach as high as MPa in a well-watered plant.
As a comparison, most automobile tires are kept at a pressure of 30–34 psi or about MPa. photosynthate: any compound that is a product of photosynthesis; Translocation to the sink: Sucrose is actively.
place. With the possibility of such changes in water potentials within the leaf, the constant translocation rate with closure is surprising. Osmotic adjustments, if they occur, must be rapidly compensated for to prevent their being reflected by a change in translocation rate in the steady-state system.
Leaf closure in Mimosa is a temporary. Membrane potentials measured here (Fig. 5, A and B) are in line with those obtained in previous studies. Membrane potentials ascribed to SEs, obtained by so-called blind piercing into petioles of intact cucurbits, were in the range between − mV (Opritov and Pyatygin, ; Pyatygin et al., ) and − mV (Eschrich et al., ).
Solute Potential. Solute potential (Ψ s), also called osmotic potential, is negative in a plant cell and zero in distilled l values for cell cytoplasm are – to – MPa.
Solutes reduce water potential (resulting in a negative Ψ w) by consuming some of the potential energy available in the molecules can dissolve in water because water molecules can bind to them.Putative differences in mechanisms of water regulation retained by plant versus animal cells become inconsequential in the light of the numerous similarities: dependence upon bioelectric potentials maintained across cell membranes, energy dependence of uphill water movement, and solute coupling during water transport.
Bioelectric potential is generated by ions in a plant cell; the potential changes with physiological activities of the plant. Therefore, measurement of the potential is a promising method for evaluation of plant activities. In this study, we investigated the mechanism of potential response generation due to photosynthetic reactions of plants.