Influence of Sprinkler Irrigation on the Incidence of Weather Fleck on Flue-Cured Tobacco in Ontario

Walker, E. K.; Vickery, L. S.

doi:10.4141/cjps61-039

Cited by 20 publications

(9 citation statements)

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“…They found recently irrigated plants more sensitive than unirrigated plants, even when adequate soil moisture was available. This moisture-stress effect under field conditions has been reported by a number of other investigators (55,58,67,97) .…”

Section: Edaphic Factorssupporting

confidence: 82%

Factors Influencing Expression of Oxidant Damage to Plants

Heck¹

1968

Annu. Rev. Phytopathol.

106

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Section: Edaphic Factorssupporting

confidence: 82%

Factors Influencing Expression of Oxidant Damage to Plants

Heck¹

1968

Annu. Rev. Phytopathol.

106

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“…In field studies, 03 injury was greater on plants grown in moist soil than those grown in drier soils (2,17,23) and the injury intensity was proportional to the amount of irrigation water applied (2,23). Plants used in greenhouse studies exhibited the same type response to water stress as did those in field studies.…”

mentioning

confidence: 99%

Water Stress Reduces Ozone Injury via a Stomatal Mechanism

Tingey

Hogsett²

1985

Plant Physiol.

120

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Various studies have shown that water-stressed plants are more tolerant of ozone exposures than are unstressed plants. Two (19). The plant root-mass was enclosed in a semipermeable membrane system (Spectrapor 1; exclusion limit, 6,000-8,000 D; Spectrum Medical Industries, Los Angeles, CA) and placed in either a nutrient solution (-35 kPa) or a nutrient solution to which polyethylene glycol (20 M) (mol wt distribution, 14,000-16,000 D) was added to create an osmotic potential of -80 kPa. Although a solution osmotic potential of -80 kPa does not appear to be a large stress, a previous study (21) showed that this level of osmotic stress in the solution caused significant changes in plant indicators of water stress. Over a 3-day period leaf conductance decreased 60%; leaf water potential and top dry weight of bean plants were reduced 13% and 34%, respectively, over a 7-d period. The osmotic potentials of the solutions were controlled at the root-water interface within the semipermeable membrane and thereby controlled plant water potential ( 19).After the plants had been maintained in -35 or -80 kPa for 4 day, 12 of the 28 plants in each replicate were sprayed with FC2 solutions (10, 15, or 20 Mm) until run-off. Previous studies showed that FC induced stomatal opening in both light and dark (4,22). The FC was dissolved in 0.1 ml ethanol and brought to volume with distilled H20. On the morning of day 5, 12 additional plants were sprayed with ABA solutions (100, 250, or 500 Mm, four plants per concentration level) and the leaves were allowed to dry (about 1 h). The ABA was dissolved in 0.1 ml of saturated Na2CO3 and diluted with a few milliliters of distilled H20 (pH 7.0). The solutions were brought to volume with 67 mm phosphate buffer (pH 7.0). Two to three drops of Triton X-100 per 50 ml of solution were added as a surfactant to each solution. The

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“…The well-known observation (Evans and Ting, 1974;Menseretal., 1963;Walker and Vickery, 1961) was confirmed, that the youngest leaves of a plant are highly resistant to ozone in comparison with fully expanded leaves (1.). The lower epidermis was more sensitive than the mesophyll with the adhering upper epidermis (2.…”

Section: Membrane Leachingmentioning

confidence: 90%

Illustration of the Genetic Differences in Ozone Sensitivity Between the Varieties Nicotiana tabacum Bel W₃ and Bel B Using Various Plant Systems

Städtler

Ziegler

1993

Botanica Acta

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The ozone‐sensitive tobacco variety Bel W3 was compared with the tolerant cv. Bel B using amphidiploid and amphihaploid genotypes of both. In search of the first genotypical differences, their reaction to acute ozone treatments was investigated with systems of decreasing degree of complexity: whole plants, grown under field, greenhouse and sterile conditions, excised tissues, calli, CCP, MCP and subcellular reactions. It was common to all systems that a fumigation, which clearly exceeds the threshold of the most tolerant material, led to equal reactions in all genotypes in respect of visible injury and membrane leaching. With whole plants and leaf discs growing conditions were found to influence the ozone threshold more than the genotype. Because the most resistant field‐grown plants vary widely in their reaction, only sterile or greenhouse grown genotypes were compared. With the exception of whole sterile plants (no genotypical threshold differences), amphihaploids were more susceptible to ozone than their respective amphidiploids as to threshold and sensitivity spectra in all systems investigated. Higher ozone thresholds were detected for Bel B in all systems with one exception: MCP exhibited a lower threshold but also a lower degree of damage in the first buffer range of the sensitivity spectrum than those of Bel W3. Post‐fumigation starch accumulation in mesophyll chloroplasts was the most prominent subcellular ozone reaction.

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Influence of Sprinkler Irrigation on the Incidence of Weather Fleck on Flue-Cured Tobacco in Ontario

Cited by 20 publications

References 0 publications

Factors Influencing Expression of Oxidant Damage to Plants

Factors Influencing Expression of Oxidant Damage to Plants

Water Stress Reduces Ozone Injury via a Stomatal Mechanism

Illustration of the Genetic Differences in Ozone Sensitivity Between the Varieties Nicotiana tabacum Bel W₃ and Bel B Using Various Plant Systems

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Influence of Sprinkler Irrigation on the Incidence of Weather Fleck on Flue-Cured Tobacco in Ontario

Cited by 20 publications

References 0 publications

Factors Influencing Expression of Oxidant Damage to Plants

Factors Influencing Expression of Oxidant Damage to Plants

Water Stress Reduces Ozone Injury via a Stomatal Mechanism

Illustration of the Genetic Differences in Ozone Sensitivity Between the Varieties Nicotiana tabacum Bel W3 and Bel B Using Various Plant Systems

Contact Info

Product

Resources

About

Illustration of the Genetic Differences in Ozone Sensitivity Between the Varieties Nicotiana tabacum Bel W₃ and Bel B Using Various Plant Systems