Phospholipid Biosynthesis and Fatty Acid Content in Relation to Chilling Injury during Germination of Seeds

Dogras, C.; Dilley, David R.; Herner, Robert C.

doi:10.1104/pp.60.6.897

Cited by 32 publications

(21 citation statements)

References 24 publications

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“…These are probably the first reports of the effect of linolenic acid concentration on germination or field emergence in flax. However, a positive association between fatty acid unsaturation and the ability to germinate and emerge at lower temperatures has been reported in Pima cotton (Bartkowski et al 1977), tomato (Maluf and Tigchelaar 1982), broad bean and pea (Dogras et al 1977).…”

Section: Resultsmentioning

confidence: 99%

Seed colour and linolenic acid effects on agronomic traits in flax

Saeidi¹,

Rowland²

1999

Can. J. Plant Sci.

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Saeidi, G. and Rowland, G. G. 1999. Seed colour and linolenic acid effects on agronomic traits in flax. Can. J. Plant Sci. 79: 521-526. Solin flax (Linum usitatissimum L.) is an edible-oil crop that must have less than 5% linolenic acid in its seed oil and a yellow seed coat. Seed vigour of solin is often lower than that of brown-seeded linseed flax and this lower seed vigour has been associated with both seed colour and linolenic acid levels. To evaluate the agronomic affect of this relationship, paired near-isogenic populations of flax differing in seed coat colour and linolenic acid concentration were selected from different crosses and sown in field trials at the Kernen Crop Research Farm, University of Saskatchewan in 1995 and 1996. Seed with brown seed coat colour had higher field emergence and seed yield than yellow-seeded types. However, emergence differences did not contribute to this seed yield variation. Maturity was not affected by seed colour but yellow seed had greater seed oil concentration and mechanical seed coat damage than brown seed. Low linolenic acid seed (2%), compared with high linolenic seed (50%), had lower field emergence in 1995, were later maturing and had higher seed yield . Linolenic acid concentration had no significant effect on oil concentration and seed damage from mechanical harvesting. Solin types had lower field emergence than industrial oil types. There was no difference for seed yield, oil concentration and seed weight between solin and industrial oil types. Solin seed was slightly later maturing and had greater seed coat damage than industrial seed in some genetic backgrounds.Key words: Seed colour, linolenic acid, emergence, seed damage, flax Saeidi, G. et Rowland, G. G. 1999. Effets de la coloration et de la teneur en acide linolénique de la graine sur les caractères agronomiques du lin. Can. J. Plant Sci. 79: 521-526. Le solin (Linum usitatissimum L.) est un lin dont la graine doit contenir une huile de moins de 5 % d'acide linolénique ainsi que porter un tégument séminal jaune. La vigueur de la semence du solin est souvent inférieure à celle des graines brunes du lin oléagineux ordinaire, défaut que l'on a relié à la fois à la couleur de la graine et au niveau d'acide linolénique. Pour évaluer les conséquences agronomiques de cette association, des populations quasiisogéniques en paires de lin, différant par la coloration du tégument et par la concentration d'acide linolénique dans la graine ont été sélectionnées à partir de divers croisements et semées en essais au champ en 1995 et en 1996 à la Kernen Crop Research Farm de la Saskatchewan. Les graines à tégument brun affichaient un taux de levée et un rendement grainier plus élevés que celles à tégument jaune, le taux de levée n'ayant toutefois pas de lien avec le rendement. Le degré de précocité de maturation n'était pas lié à la coloration de la graine, mais les graines jaunes contenaient plus d'huile et étaient plus sensibles aux endommagements mécaniques du tégument à la récolte. Par rapport aux graines à forte ...

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Section: Resultsmentioning

confidence: 99%

Seed colour and linolenic acid effects on agronomic traits in flax

Saeidi¹,

Rowland²

1999

Can. J. Plant Sci.

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“…The fluidity of biological membranes may be governed by metabolic regulation of lipid composition (23). In response to external stimuli, such as temperature, changes in metabolism and acyl-lipid saturation of membranes often are observed (2,7,11). In root tissues of several species (1,5,9,12,18,21,22), the ratio of polyunsaturated to saturated fatty acid concentration generally increases with decreases in temperature.…”

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confidence: 99%

Fatty Acid Composition and Nitrate Uptake of Soybean Roots during Acclimation to Low Temperature

Osmond

Wilson²,

Raper³

1982

Plant Physiol.

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Fatty acid composition of old and new roots was determined for soybeans (Glycine max IL.I Merr. cv Ransom) at root-zone temperatures of 14, 18, and 22°C during a 26-day period. New roots had a greater concentration of polyunsaturated fatty acids than old roots. The ratio of polyunsaturated to saturated fatty acid concentration in new roots exposed to 14 and 18°C peaked at 16 days and declined, while the corresponding ratio in old roots increased throughout the treatment period. Apparently the response of fatty acid composition in old and new roots to low temperature was mediated by tissue aging or differentiation. These findings were contrary to the concept that modifications in fatty acid composition remain constant at lower temperatures.The function of root tissues exposed to lower temperature was evaluated with respect to the ability of the root systems to absorb N03-. Over the relatively long periods of exposure, the ability of whole root systems to absorb N03-was similar at cool and warm temperatures. The effect of cool temperature on functioning of roots appeared to involve reductions in the rates of initiation and differentiation of young root tissues rather than changes in membrane permeability related to alteration of fatty acid composition.Biological membranes require a fluid physical state to function (23). The fluidity of biological membranes may be governed by metabolic regulation of lipid composition (23). In response to external stimuli, such as temperature, changes in metabolism and acyl-lipid saturation of membranes often are observed (2,7,11). In root tissues of several species (1,5,9,12,18,21,22), the ratio of polyunsaturated to saturated fatty acid concentration generally increases with decreases in temperature. At low temperature, a decrease in membrane fluidity enhances polyunsaturated fatty acid formation, while at higher temperatures an increase in fluidity favors the synthesis of saturated acyl-units (10, 23

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“…The ability of tomato seed to germinate in cold temperatures was positively correlated with seed linolenic acid concentration but was negatively correlated with oleic acid concentration (Maluf and Tigchelaar 1982). According to Dogras et al (1977), chilling resistance of the seed was positively associated with unsaturation of the fatty acids in the seed of broad beans (Vicia faba L.) and peas (Pisum sativum L.). Unsaturated/saturated fatty acid ratio of seed lipids in Pima cottonseed (Gossypium barbadense L.) showed a low correlation with laboratory germination percentage, but had a strong, positive correlation with emergence under field conditions at low soil temperatures (Bartkowski et al 1977).…”

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confidence: 99%

“…Germination capability and seed vigour are two important characteristics of seed that may be affected by seed colour and fatty acid composition (Culbertson and Kommendahl 1956;Dogras et al 1977). High-vigour seed emerges rapidly and uniformly and thus develops normal seedlings under a wide range of field conditions (Association of Official Seed Analysts [AOSA] 1983).…”

mentioning

confidence: 99%

The effect of temperature, seed colour and linolenic acid concentration on germination and seed vigour in flax

Saeidi¹,

Rowland²

1999

Can. J. Plant Sci.

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Saeidi, G. and Rowland, G. G. 1999. The effect of temperature, seed colour and linolenic acid concentration on germination and seed vigour in flax. Can. J. Plant Sci. 79: 315-319. In Canada, the edible-oil type of flax (Linum usitatissimum) known as solin must have a linolenic acid concentration of less than 5% and a yellow seed colour. The yellow seed distinguishes solin from regular, high-linolenic acid linseed flax. Both altered fatty acid ratios and seed colour can have a negative impact on seed germination. The effects of temperature, seed colour and seed linolenic acid concentration on germination and seed vigour were studied in four populations that were near-isogenic for seed colour and linolenic acid level. For all populations, a germination temperature of 5°C resulted in a significantly lower germination than at 10 or 15°C. With one exception at 5°C, where yellow seed had a greater germination than brown seed, there was no difference in germination frequency between brown and yellow seed. Also, there was no difference in germination between low and high linolenic acid seed with the exception of one population where low linolenic acid seeds had lower germination at 5°C. In vigour tests however, yellow seed had lower seed vigour than brown seed in all populations. Low linolenic acid seeds had lower seed vigour than high linolenic acid seed in one population. Selection for seed vigour is essential in the breeding of solin varieties. Ce dernier caractère le distingue du lin ordinaire riche en acide linolénique. La modification des proportions de l'acide gras et la coloration de la graine pourraient avoir des effets négatifs sur le pouvoir germinatif des semences. Nous avons donc examiné sur quatre populations, quasi-isogéniques quant à la coloration de la graine et à la teneur en acide linolénique, les effets de la température, de la coloration de la graine et de la concentration d'acide linolénique sur le pouvoir germinatif et sur la vigueur de la semence. Chez toutes les populations, une température de germination de 5°C conduisait à un pourcentage de germination significativement plus bas qu'à 10 ou 15°C. À une seule exception près, à 5°C où les graines jaunes démontraient un taux de germination plus élevé que les graines à tégument brun, on ne constatait aucune différence de la fréquence de germination entre les 2 types de graine. Il n'y en avait pas non plus entre les graines à basse et celles à haute teneur en acide linolénique, à part une population dans laquelle les premières avaient un moins bon pouvoir germinatif à 5°C. En revanche, dans les essais de vigueur les graines jaunes démontraient moins de vigueur, que les graines brunes, quelle que soit la population. Dans une population, les graines à basse concentration d'acide linolénique étaient moins vigoureuses que celles à forte concentration. La sélection sur la vigueur de la semence s'impose donc dans les programmes de création des variétés de solin.

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Phospholipid Biosynthesis and Fatty Acid Content in Relation to Chilling Injury during Germination of Seeds

Cited by 32 publications

References 24 publications

Seed colour and linolenic acid effects on agronomic traits in flax

Seed colour and linolenic acid effects on agronomic traits in flax

Fatty Acid Composition and Nitrate Uptake of Soybean Roots during Acclimation to Low Temperature

The effect of temperature, seed colour and linolenic acid concentration on germination and seed vigour in flax

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