Differential Aluminum Tolerance of High-Yielding, Early-Maturing Canadian Wheat Cultivars and Germplasm

Briggs, K. G.; Taylor, Gregory J.; Sturges, Ian; Hoddinott, John

doi:10.4141/cjps89-008

Cited by 16 publications

(3 citation statements)

References 16 publications

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“…Aluminum treatment was associated with decreased root length and increased root callose deposition, especially in the A1-sensitive cultivars. Both parameters ranked cultivars for A1 resistance similarly to published reports (Briggs et al, 1989), although root length was a more sensitive indicator than root callose concentration. Compared to Al-free controls, root length in the two Al-sensitive cultivars decreased by 23% after treatment with only 50 #M A1, whereas root callose concentration increased by 250% after treatment with 150 # M A1.…”

Section: Discussionsupporting

confidence: 67%

Aluminum-induced deposition of (1,3)-?-glucans (callose) inTriticum aestivum L.

1994

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Aluminum (A1)-induced damage to leaves and roots of two Al-resistant (cv. Atlas 66, experimental line PT741) and two Al-sensitive (cv. Scout 66, cv. Katepwa) lines of Triticum aestivum L. was estimated using the deposition of (1, 3)-/3-glucans (callose) as a marker for injury. Two-day-old seedlings were grown for forty hours in nutrient solutions with or without added A1, and callose deposition was quantified by spectrofluorometry (0-1000 #M A1) and localized by fluorescence microscopy (0 and 400 #M A1). Results suggested that A1 caused little damage to leaves. No callose was observed in leaves with up to 400 #M A1 treatment. In contrast, root callose concentration increased with A1 treatment, especially in the Al-sensitive lines. At 400 #M A1, root callose concentration of Al-sensitive Scout 66 was nearly four-fold that of Al-resistant Atlas 66. After A1 treatment, large callose deposits were observed in the root cap, epidermis and outer cortex of root tips of Scout 66, but not Atlas 66. The identity of callose was confirmed by a reduced fluorescence in Al-treated roots: firstly, after adding an inhibitor of callose synthesis (2-deoxy-D-glucose) to the nutrient solution, and secondly, after incubating root sections with the callosedegrading enzyme/3-D-glucoside glucohydrolase [EC 3.2.1.21]. Root callose deposition may be a good marker for Al-induced injury due to its early detection by spectrofluorometry and its close association with stress perception. Abbreviations: DDG-2-deoxy-D-glucose, PAS-periodic acid-Schiffs reagent, PE-pachyman equivalents

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Section: Discussionsupporting

confidence: 67%

Aluminum-induced deposition of (1,3)-?-glucans (callose) inTriticum aestivum L.

1994

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“…The experimental procedure used to screen for Mn tolerance in wheat (Triticum aestivum L.) was similar to that used by and by Briggs et al (1989). A total of 91 spring wheat cultivars, 76 of which were Canadian from several wheat classes (Canada Western Red Spring (CWRS), Canada Prairie Spring (CPS), Canada Utility (CU) and, Canada Western Soft White Spring (CWSWS)), were screened in this study.…”

Section: Germinationmentioning

confidence: 99%

Pedigree analysis of the origin of manganese tolerance in Canadian spring wheat (Triticum aestivum L.) cultivars

1991

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Breeding wheat (Triticum aestivum L.) for tolerance to manganese (Mn) might be in some cases more feasible and economical than use of soil amendments. As part of research on the heritability of Mn tolerance, a study on the level of Mn tolerance in Canadian wheat cultivars and its probable origin was accomplished by analysis of cultivar pedigrees and drawing phylogenetic maps to discern filial relationships. Cultivar tolerance to Mn was determined by relative root weight (RRW) in solution culture in the presence of 500/zM Mn. A total of 91 cultivars were screened, 76 of which were Canadian. These data, together with data from another 28 cultivars reported in the literature, were used to draw two pedigree maps, a map for Canadian cultivars only, and a map for the Mn-tolerant Canadian cultivars Norquay and Laura. Results indicated a range of tolerance to Mn among Canadian cultivars. Manganese tolerance, found in either Canadian or foreign germplasm, and of either recent or older selection or origin, seems to have originated from land races from Rio Grande do Sul, the southernmost state of Brazil. Tolerance may have been introduced into Canadian germplasm directly by the use of Brazilian cultivars as parents, or indirectly by the introduction of Mexican germplasm with Brazilian parentages. This information will help the plant breeder to develop plant breeding systems, and may also help in the study of the mechanisms for Mn tolerance in wheat.

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“…Differential response of wheat cultivars (Triticum aestivum L.) to A1 has been described in a number of reports (Beckman, 1976;Briggs et al, 1989;Campbell and Lafever, 1976;Da Silva, 1976;Mugwira et al, 1981;Taylor and Foy, 1985a,b). Cultivar tolerance to aluminum can be assessed by the relative performance of that cultivar in conditions of varying degrees of A1 toxicity (Kerridge et al, 1971;Lafever et al, 1977;Taylor and Foy, 1985a,b).…”

Section: Introductionmentioning

confidence: 99%

Seedling root response of some Kenyan bread wheat cultivars grown in acid nutrient culture solution containing aluminum

Nyachiro

Briggs

1994

Plant Soil

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The objective of this study was to determine whether a series of Kenyan bread wheat cultivars differed in tolerance to aluminum toxicity. Fourteen Kenyan wheat cultivars representing current and former widely grown cultivars of diverse pedigree origin, and two control cultivars, Maringa (Al-tolerant) and Siete Cerros (Al-susceptible), were tested in solution cultures with 0 (control), 148, 593, and 2370 t~M A1 at pH4.6. Highly significant (p ~<0.01) differences in seedling growth were observed among cultivars for root mass, root length and root tolerance index (RTI). Significant (p ~< 0.05) cultivar × treatment interactions were observed for root mass and RTI. All characters were negatively affected by increased AI concentration, with root length and root mass being affected the most. RTI is a commonly used index which measures the relative performance of individual cultivars with and without aluminum stress. High levels of tolerance to AI were identified in the Kenyan cultivars by evaluating RTI with this simple nutrient solution technique. Romany and Kenya Nyumbu had RTI values approaching those of the A1 tolerant Brazilian cultivar Maringa, a spring wheat standard that has been used for high A1 tolerance.

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Differential Aluminum Tolerance of High-Yielding, Early-Maturing Canadian Wheat Cultivars and Germplasm

Cited by 16 publications

References 16 publications

Aluminum-induced deposition of (1,3)-?-glucans (callose) inTriticum aestivum L.

Aluminum-induced deposition of (1,3)-?-glucans (callose) inTriticum aestivum L.

Pedigree analysis of the origin of manganese tolerance in Canadian spring wheat (Triticum aestivum L.) cultivars

Seedling root response of some Kenyan bread wheat cultivars grown in acid nutrient culture solution containing aluminum

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