Photosynthesis in Phaseolus Vulgaris L., as Influenced by Supra-Optimal Zinc Nutrition

Assche, Frank Van; Clijsters, H.; Marcelle, R

doi:10.1007/978-94-009-9625-0_16

Cited by 22 publications

(18 citation statements)

References 19 publications

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“…Dwarf beans (Phaseolus vulgaris L., c.v. Limburgse Vroege) were grown in vermiculite in a growth chamber at 80% relative humidity, .photon flux density of about 200 micro-Einsteins (~E)m -2 s -1 and 25°C during the day (12 h), and 21°C during the night (12 h In addition to macro-nutrients, two different levels of zinc sulphate were applied to the substrate: an optimal dose, resulting in maximal plant growth, and a supra-optimal one, which reduced growth and net photosynthesis, as previously described [20].…”

Section: Plant Materialsmentioning

confidence: 99%

“…Leaf CO2 compensation point determinations were performed with an ADC type 225 MK II gas analyser on attached leaves in a closed circuit under the same photon flux density as previously used for the gas exchange measurements in the open air system [20]. Variation of CO2 compensation point with photon flux was not studied.…”

Section: Pnmentioning

confidence: 99%

“…Heavy metals such as cadmium, nickel, thallium [2] and zinc [20] inhibit net photosynthesis of plants in vivo. Because transpiration is also reduced [2], it is likely that the lowered photosynthetic rates are associated with lower stomatal conductances.…”

Section: Introductionmentioning

confidence: 99%

“…We have shown that supra-optimal levels of zinc reduce stomatal conductance of leaves and the activities of several chloroplastic and peroxisomal enzymes [20]. In this paper the reduction of leaf conductance to CO2 diffusion is investigated further.…”

Section: Introductionmentioning

confidence: 99%

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Zinc mediated effects on leaf CO2 diffusion conductances and net photosynthesis in Phaseolus vulgaris L.

1980

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Supra-optimal levels of zinc in primary leaves of Phaseolus vulgaris increased the CO2 compensation point and inhibited net photosynthesis. Leaf morphology was modified: mesophyll intercellular area, stomatal slit length and interstomatal distance were reduced, but stomatal density increased. Internal and stomatal conductances to CO2 diffusion decreased. These changes are discussed in relation to the observed effects on leaf gas exchange and to the previously reported inhibition of different photosynthetic and photorespiratory enzymes.

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Section: Plant Materialsmentioning

confidence: 99%

Section: Pnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zinc mediated effects on leaf CO2 diffusion conductances and net photosynthesis in Phaseolus vulgaris L.

1980

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“…Although no change in chlorophyll content was observed in both Cladonia spp. (the authors' observation), and CHETTRI AND SAWIDIS also in Phaseolus vulgaris (Van Assche et al, 1979), treated with a toxic amount of Zn, K + efflux data indicated that Zn permeation through the plasma membrane in C. rangiformis is less than that in C. convoluta. This must be one of the reasons for the diminished water loss in 10 −8 and 10 −6 M Zn-treated C. rangiformis.…”

Section: Heavy Metals and Lichen Thalli Water Lossmentioning

confidence: 72%