نتایج جستجو برای: mesophyll conductance

تعداد نتایج: 39827  

Journal: :Photosynthetica 2021

The balance between stomatal and mesophyll conductance has been reported to directly influence intrinsic water-use efficiency (WUEi), but it is unclear whether variations in limitations (lsc lm, respectively) affect WUEi during soil drought rewatering. Limitations (lsc, lm biochemical limitation, lb) were measured Manchurian ash (Fraxinus mandshurica Rupr.) Mongolian oak (Quercus mongolica Fish...

2016
Jorge Gago Danilo de Menezes Daloso Carlos María Figueroa Jaume Flexas Alisdair Robert Fernie Zoran Nikoloski

Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears, 07122 Palma de Mallorca, Illes Balears, Spain (J.G., J.F.); Central Metabolism Group, Molecular Physiology Department, Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Golm, Germany (J.G., D.d.M.D., A.R.F.); System Regulation Group, Metabolic Networks Departmen...

Journal: :Tree physiology 2003
Thijs L Pons Rob A M Welschen

High midday temperatures can depress net photosynthesis. We investigated possible mechanisms underlying this phenomenon in leaves of Eperua grandiflora (Aubl.) Benth. saplings. This tropical tree establishes in small gaps in the rainforest canopy where direct sunlight can raise midday temperatures markedly. We simulated this microclimate in a growth chamber by varying air temperature between 28...

Journal: :Plant, cell & environment 2015
Christine Scoffoni

One of the most tantalizing unresolved questions in plant hydraulics is: where does water evaporate within the leaf? While several studies have explored experimental routes to answer this question (e.g. Sheriff & Meidner 1974; Farquhar & Raschke 1978), none have been able to provide a clear answer. In this issue of Plant, Cell & Environment, Tom Buckley has presented a new mathematical model in...

Journal: :journal of plant physiology & breeding 2012
tayebe jafarian aliakbar maghsoudi moud vahid reaz saffari

water stress effects on winter and spring leaves anatomy were investigated in experiments conducted at the experimental field of sb university of kerman using five wheat cultivars.xylem and phloem elements diameter and mesophyll, bundle sheath and epidermal cells area were measured in transverse sections prepared from middle parts of the leaves. results showed that significant difference exists...

Journal: :Tree physiology 2011
David Whitehead Margaret M Barbour Kevin L Griffin Matthew H Turnbull David T Tissue

Mesophyll conductance, g(m), was estimated from measurements of stomatal conductance to carbon dioxide transfer, g(s), photosynthesis, A, and chlorophyll fluorescence for Year 0 (current-year) and Year 1 (1-year-old) fully sunlit leaves from short (2 m tall, 10-year-old) and tall (15 m tall, 120-year-old) Nothofagus solandrii var. cliffortiodes trees growing in adjacent stands. Rates of photosy...

Journal: :Journal of experimental botany 2009
Ulo Niinemets Ian J Wright John R Evans

Foliage structure, chemistry, photosynthetic potentials (V(cmax) and J(max)), and mesophyll diffusion conductance (g(m)) were quantified for 35 broad-leaved species from four sites with contrasting rainfall and soil fertility in eastern Australia. The aim of the study was to estimate the extent to which g(m) and related leaf properties limited photosynthesis (A), focusing on highly sclerophyllo...

Journal: :The New phytologist 2009
Víctor Resco Brent E Ewers Wei Sun Travis E Huxman Jake F Weltzin David G Williams

The hypothesis that drought intensity constrains the recovery of photosynthesis from drought was tested in the C(3) woody legume Prosopis velutina, and the mechanisms underlying this constraint examined. Hydraulic status and gas exchange were measured the day before a 39 mm precipitation pulse, and up to 7 d afterwards. The experiment was conducted under rainout shelters, established on contras...

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