Foliar Response of Six Clones of Hybrid Poplar

Evans, Lance S.; Gmür, Nicholas F.; Costa, F.

doi:10.1094/phyto-68-847

Cited by 63 publications

(11 citation statements)

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“…Youngest and oldest leaves are least affected by simulated acid rain (Evans, Gmur & Da Costa, 1978), whilst cotyledons are most affected (Caporn & Hutchinson, 1986). The data presented here are from leaves of intermediate sensitivity.…”

Section: Discussionmentioning

confidence: 84%

Effects of Simulated Acid Rain on Production, Morphology and Composition of Epicuticular Wax and on Cuticular Membrane Development

Percy

Baker

1987

New Phytologist

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SUMMARYLeaves of Phaseolus vulgaris L., Vicia faba L., Pisum sativum L. and Brassica napus L. were exposed to simulated rain from emergence to full expansion at seven pHs between 56 and 26, applied at 2 mm h"^ in amounts and at intervals representative of ambient rain in southwestern England. Leaf expansion was unaffected by rain pH greater than 30 in V.faba, and pH 2 6 in the other species. Macroscopic foliar injury was induced at pH ^ 34 in non-wettable leaves of P. sativum and B. napus which had relatively large deposits of crystalline epicuticular wax, and at pH 3-0 in wettable leaves of P. vulgaris and V. faba which had small deposits of amorphous wax. Foliar injury was greatest in species with crystalline wax. Wax production was affected by simulated acid rain in all species and was often accompanied by changes in wax composition. Wax quantity was reduced on leaves of P. vulgaris exposed to rain at pH ^ 4 6, while wax on leaves of P. sativum and B. napus had increased numbers of smaller plates and tubes, respectively, per unit area at pH ^4 6. Leaves of B. napus, stripped of crystalline epicuticular wax at about 20% full expansion, regenerated less wax at pH 3 4 than at pH 5 6. The thickness of the cuticular membranes in leaves of P. vulgaris, V.faba and P. sativum exposed to simulated acid rain at pH < 4 2 decreased by 28 to 35 % compared with those exposed to pH 5 6 rain. Membrane ultrastructure was also altered in leaves of P. vulgaris. Taken together, these changes could have important consequences for leaf wettability, rainfall retention, foliar uptake of chemicals and host-parasite interactions.

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Section: Discussionmentioning

confidence: 84%

Effects of Simulated Acid Rain on Production, Morphology and Composition of Epicuticular Wax and on Cuticular Membrane Development

Percy

Baker

1987

New Phytologist

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“…Leaf injury is largely determined by contact time of acidic water droplets with foliage (Evans et al, 1981) which, in turn, is influenced by surface wettability and morphological features where water might normally accumulate (e.g. Evans, Gmur & Dacosta, 1977, 1978.…”

Section: Introductionmentioning

confidence: 99%

Cellular Readjustment of Barley Seedlings to Simulated Acid Rain

Wolfenden

Wellburn

1986

New Phytologist

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SUMMARYNo changes in buffer capacity at any range of pH were detected in either the shoots or roots of 9 d old hydroponically-grown harley seedlings which had heen grown in dilute acid (pH 3 or 4) for the last 4 days of growth. Similar lack of change in buffer capacity was observed in barley which had been intermittently sprayed with acidic mists (pH 3 or 4) as compared to those sprayed with pH 5-6 media for the last 2 or 4 d of growth. Acidic treatments, especially growth in acidic media or 2 d of occasional spraying, caused significant increases in the levels of plastidic sulphate, as measured hy high performance ion chromatography but no changes in the plastidic concentrations of other anions occurred. High field ^'P-NMR spectroscopy of barley shoot tissue showed that the vacuolar pH levels (as revealed by the pH-dependent orthophosphate signals) of those tissues which had been sprayed with acidic solutions (pH 3 or 4) for 2 d were significantly lower than in those similarly sprayed with pH 5-6 solutions. This may mean that ATP-dependent H+-pumps in the tonoplast are involved in cellular readjustments to the imposed acidity. No growth reductions or visible injury were detected over these short term treatments but these changes of vacuolar pH and plastidic sulphate content may indicate that homeostatic adjustments have an energetic cost which may ultimately account for reductions in plant growth attributed elsewhere to acidic precipitation.

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“…White suckers (Figures 3,4,7,and 8) were much more sensitive :c a. As a result, simple generalizations concerning expected effects of increasing Al concentrations with acidification are not possible.…”

Section: Resultsmentioning

confidence: 96%

“…The three rivers with the lowest CDRs, the Roseway, the Mersey, and the Medway, are in southern Nova Scotia, and have strongly colored waters. 7 Year Fig. The Mersey River data indicate a slightly smaller excess S04 --load than the Roseway to the south and the Medway to the north.…”

Section: Examplesmentioning

confidence: 95%

“…One possibility is to adopt a condition implying a non-perfect sink for particles at the surface. We therefore propose the simple boundary condition: (7) where.z s is the effective sink height, as an approximation to the true deposition. We therefore propose the simple boundary condition: (7) where.z s is the effective sink height, as an approximation to the true deposition.…”

Section: Model Developmentmentioning

confidence: 99%

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Long-Range Transport of Airborne Pollutants

Martin¹

1982

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Foliar Response of Six Clones of Hybrid Poplar

Cited by 63 publications

References 0 publications

Effects of Simulated Acid Rain on Production, Morphology and Composition of Epicuticular Wax and on Cuticular Membrane Development

Effects of Simulated Acid Rain on Production, Morphology and Composition of Epicuticular Wax and on Cuticular Membrane Development

Cellular Readjustment of Barley Seedlings to Simulated Acid Rain

Long-Range Transport of Airborne Pollutants

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