Physiological Evaluation of Drought Resistance in Oats

Yadava, R. B. R.; Bhatt, R. K.

doi:10.1111/j.1439-037x.1989.tb00747.x

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…According to recent studies ( Larsson andGorny 1988, Yadava andBhatt 1989), oat cultivars differ from each other in their sensitivity to drought stress and more emphasis has recently been directed to finding timesaving methods for the evaluation of drought resistance in breeding programs (e.g. Larsson 1982, Barbour and Murphy 1984, Corbellini et al 1988, Parlevliet 1988, Ritchie et al 1990).…”

Section: Discussionmentioning

confidence: 99%

“…The present study, however, indicated that in long day conditions (daylength 18 h), as in northern latitudes, the compensation of yield losses by the production of secondary tillers was not adequately effective and, as disadvantage, it retarded the ripening of the oat stand by three weeks according to the present study resulting in a considerable risk of crop losses and quality deterioration (Mukula and Rantanen 1989). The best impression of drought resistance in cereals can be attained by comparing the yield of a cultivar when well-watered and when water stressed (Yadava andBhatt 1989, Ritchie et al 1990). By measuring the drought resistance index (R, Larsson and Gorny 1988) on the basis of the panicle weight of well-watered and moderately water stressed oat individuals it was revealed that both cultivars had considerable yield losses.…”

Section: Discussionmentioning

confidence: 99%

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Effect of moderate and severe drought stress on the pre-anthesis development and yield formation of oats

Peltonen‐Sainio¹

1991

AFSci

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Greenhouse experiments were conducted at the University of Helsinki, Department of Crop Husbandry in 1989 and 1990 to provide information on the effects of drought stress on the developmental rate of the panicle, formation and abortion of florets, and formation of yield components in two oat cultivars, both adapted to the northern marginal growing conditions. Moderate water deficit and severe drought stress did not affect the developmental rate of the panicle, but the pre-anthesis and post-anthesis architecture changed considerably; leaves unrolled later, the number of green leaves was lower, the internodes lengthened less, and the inflorescence was shorter as a consequence of water deficit. Drought stress decreased the number of fertile florets in the panicle significantly, in the lower clusters of branches in particular. In the cultivar “Puhti”, 57 % of the fertile florets aborted as a consequence of moderate drought stress and 89 % as a result of severe drought stress when compared to well-watered individuals, while in “Virma”, a cultivar of significantly higher yield potential, 80 °lo and 90 % of the fertile florets wilted, respectively. In addition, water deficit caused considerable losses in all the morphological characteristics measured. Further implications of these results for yield formation are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of moderate and severe drought stress on the pre-anthesis development and yield formation of oats

Peltonen‐Sainio¹

1991

AFSci

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“…Although the antimicrobial properties of thioureas have been related [7,8,15], they are limited both in terms of microorganisms' strains and structural diversity. To the best of our knowledge, no systematic screening has been reported for this class of compounds.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of our knowledge, no systematic screening has been reported for this class of compounds. Among the thioureas, the N-phenyl and N-benzoyl derivatives caught our attention because previously published results concerning the low toxicity of these thiourea derivatives [14,15] suggested their potential as antibiotic drugs.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity and Structural Study of Disubstituted Thiourea Derivatives

et al. 2007

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The antimicrobial activity of six N-phenyl-and fourteen N-benzoylthiourea derivatives were evaluated from their Minimal Inhibitory Concentration (MIC) values using the microdilution procedure against ten microorganisms. Most of the compounds exhibited selective activity against fungi and Gram-positive bacteria, which were very effectively inhibited by some of the tested thioureas. Additionally, SAR considerations and four novel X-ray diffraction structures of N-benzoylthioureas are included.

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“…Drought stress is the major causes for crop loss worldwide, reducing average yields with 50% and above (Wang et al, 2003). A number of physiological and biochemical attributes have been employed to screen crop plants for their drought tolerance (Singh et al, 1972;Jones and Rawson, 1979;Yadav and Bhatt, 1989). The genus Avena comprises several hexaploid, tetraploid and diploid species of which the widely cultivated hexaploid species is Avena sativa.…”

Section: Introductionmentioning

confidence: 99%

Studies on morpho-physiological characters of different Avena species under stress conditions

Pandey¹,

Baig²,

Ahmed³

et al. 2013

Afr. J. Biotechnol.

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Seven species of oat (Avena) were evaluated for their relative drought tolerance under soil moisture stress. The plant height, leaf area production and biomass yield reduced under soil moisture stress. Among the species tested, minimum reduction in height was recorded in Avena vaviloviana, Avena abyssinica and Avena sterilis at vegetative and flowering stages. Significant decrease in leaf area production was recorded at vegetative stage, whereas at flowering stage, the decrease in leaf area production was marginal in A. sterilis followed by A. abyssinica predicting their more adaption to stress environment. The increase in specific leaf weight (SLW) of all the species of Avena showed increase in leaf thickness, exhibiting high water retention capacity under soil moisture stress condition which is a requisite trait for drought tolerance. Soil moisture stress imposed at vegetative and flowering stages reduced fresh biomass yield in all the species. Minimum reduction in dry biomass accumulation under stress environment at vegetative stage was recorded in A. sterilis followed by A. strigosa and A. sativa, exhibiting their tolerance to drought at early stages of growth. However, at flowering stage, minimum decrease in dry biomass production was recorded in A. sterilis (3.47%) followed by A. marocana (12.56%) indicating their relative drought tolerance at flowering stage of crop growth. A significant positive correlation between total leaf area and dry biomass (r 2 =0.738) under stress environment indicates that dry biomass accumulation was governed by total leaf area production. A. sterilis accumulated maximum fresh and dry biomass under soil moisture stress with minimum reduction over the non stress environment, indicating its drought tolerance potential as compared to other genotypes tested.

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Physiological Evaluation of Drought Resistance in Oats

Cited by 4 publications

References 6 publications

Effect of moderate and severe drought stress on the pre-anthesis development and yield formation of oats

Effect of moderate and severe drought stress on the pre-anthesis development and yield formation of oats

Antimicrobial Activity and Structural Study of Disubstituted Thiourea Derivatives

Studies on morpho-physiological characters of different Avena species under stress conditions

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