Salt tolerance within populations of chewing fescue (<i>Festuca Rubra</i>, L.)

Khan, A. Hafeez; Marshall, Chris

doi:10.1080/00103628109367233

Cited by 24 publications

(7 citation statements)

References 11 publications

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“…Considerable success has been achieved in the selection of salinity tolerant lines of wheat and barley by Epstein and his colleagues based on simple phenotypic differences (EPS- TEIN and NORLYN 1977, NORLYN and EPSTEIN 1984, EPSTEIN 1985. There is ample evidence from a number of wild species (HANNON and BRADSHAW 1968, VENABLES and WILKINS 1978, KHAN and MARSHALL 1981, ASHRAF et al 1986 that simple measures of phenotypic response to salinity stress can distinguish individuals originating from saline habitats and those from non-saline habitats using a methodology which meets the criteria given above. Nonetheless a widely held view has emerged that only with knowledge of the mechanisms of salinity tolerance can progress be made towards developing salinity tolerant crop lines (SRIVASTAVA andJA-NA 1984, PoNNAMPERUMA 1984).…”

Section: Discussionmentioning

confidence: 99%

The Potential for Exploiting Variation in Salinity Tolerance in Pearl Millet (Pennisetum americanum (L.) Leeke)

Ashraf

McNeilly²

1992

Plant Breeding

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Shoot and root growth and plant dry weight were determined for twenty four accessions of pearl millet, Pennisetum americanum (L.) Leeke, after two weeks growth in saline solution culture at EC 20 dS m~'. The EC was achieved using NaCl + CaCl21 :1 by weight in solution culture. Although salinity markedly inhibited growth of all accessions, three, 93613, KAT/PM-2 Kitui, and Kitui local produced significantly greater dry matter, and they and 93612 had longer shoots than the other accessions. Accessions WCA 78 and Bulk 7704 were highly sensitive to salinity in all 3 characters measured. There was considerable variation between the 24 accessions, suggesting that selection for increased tolerance to salinity in pearl millet should be possible. This was examined using normal seed of the cultivar Al/3. A first cycle of selection screened 16,000 seeds after 15 days growth in nutrient solution at EC 26 dS m~\ 106 individuals were selected to form the S] selection line. Selected seedlings were grown to maturity and polycrossed.In a second cycle of selection, 30,000 Sj polycross progeny were screened as previously, but at EC 30 dS m~'. A selection intensity of 0.08 % was achieved. The selected plants were again grown to maturity and again polycrossed.Efficiency of the selection procedure was assessed from comparison in sand culture of the performance of the selected line with the unselected Al/3 line and Kitui local which from the previous assessment of the 24 accessions was rated as relatively salinity tolerant. The selection line was superior to the other two lines at four salinity levels. The results of this study suggest that further improvement in salinity tolerance in pearl millet may be expected from further selection and breeding, using the methods described here.

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Section: Discussionmentioning

confidence: 99%

The Potential for Exploiting Variation in Salinity Tolerance in Pearl Millet (Pennisetum americanum (L.) Leeke)

Ashraf

McNeilly²

1992

Plant Breeding

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“…rubra is widely dispersed in maritime and inland saline habitats and has been shown by a number of workers to have salt tolerant populations (Hannon & Bradshaw, 1968;Venables & Wilkins, 1978;Khan & Marshall, 1981). The overall mean root length of the high selected line showed that a small positive and significant response (P < 0-001 cv.…”

Section: Discussionmentioning

confidence: 99%

THE POTENTIAL FOR EVOLUTION OF SALT (NaCl) TOLERANCE IN SEVEN GRASS SPECIES

1986

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SUMMARYThe seedling root growth of Agrostis stolonifera L., Agrostis capillaris L., Holcus lanatus L., Loliiim perenne L., Dactylis glomerata L., Festuca rubra L. and PuccineUia distans (L.) Parl. was examined after 14 d of immersion in dilute nutrient solutions containing 0, 150, and 250 mol m-'' NaCl. Root growth of all species was significanfly reduced by increasing NaCl concentration.Samples of 10000 to 20000 seeds of each species were then screened for ability to root in solution cultures at NaCl concentrations which markedly inhibited root growth in the first experiment. Small numbers of individuals of all species rooted in these solutions and high and low selection lines were established based upon root length values.Adult plants from these high and low selected lines were compared with an unselected sample for ability to root in a range of NaCl concentrations. The high line plants had significantly longer roots than the unselected plants in all species, and than the low selected line in all species except Agrostis capillaris. Low selected plants had significantly longer roots than unselected plants in Holcus lanatus, and Dactylis glomerata.The pattern of response to selection showed no consistent relationship to the known ecology of the species examined, and suggests that variability in salt tolerance is widely present in species, but for other reasons salt tolerance does not always evolve in natural situations.

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“…have a wide ecological amplitude and are often abundant in glycophytic communities, but are likely to be represented by salt-tolerant genotypes in saltmarsh populations (Hannon & Bradshaw, 1968;Ahmad and Wainwright, 1977;Khan & Marshall, 1981 ;Ashraf, McNeilly & Bradshaw, 1986a). …”

Section: The Grasses Agrostis Stolonifera L and Festuca Rubramentioning

confidence: 99%

“…Tbe measurements of absolute root growtb provide data on the relative vigour of root growth in different populations and on the patterns of growth and response to different NaCl concentrations witbin and between populations. Tbe indices of salt tolerance provide data on tbe relative effects of increasing NaCl concentration on each population, enabling comparisons to be made in a convenient and standard form (1 Iannon & Bradshaw, 1968;Khan & Marshall, 1981).…”

Section: Data A?ialysismentioning

confidence: 99%

Salt tolerance in natural populations of Trifolium repens L.

et al. 1988

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SUM iVl ARYThe salt tolerances of plants from tiatural populations of Trifolium repens L, (White Clover) growing in saline and non-saline sites were compared by root growth tests at a range of NaCl coticentrations. Platits from three saltmarsh sites showed high or very high salt tolerance, with relatively vigorous root growth in 150-200 mM NaCl, Plants with two non-saline inland sites showed little or no tolerance, A sea-clifF population and plants of cv, Gwenda showed intermediate levels of tolerance at low salt concentrations. Halophytic maritime populations may provide material for the development of salt tolerant cultivars of T. repens, a crop plant in which most existing cultivars are thought to be salt-sensitive.

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Salt tolerance within populations of chewing fescue (Festuca Rubra, L.)

Cited by 24 publications

References 11 publications

The Potential for Exploiting Variation in Salinity Tolerance in Pearl Millet (Pennisetum americanum (L.) Leeke)

The Potential for Exploiting Variation in Salinity Tolerance in Pearl Millet (Pennisetum americanum (L.) Leeke)

THE POTENTIAL FOR EVOLUTION OF SALT (NaCl) TOLERANCE IN SEVEN GRASS SPECIES

Salt tolerance in natural populations of Trifolium repens L.

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