The effect of fungicides and plant growth regulators applied as a seed treatment on the freezing tolerance of winter wheat

Gusta, L. V.; O’Connor, B. J.; Lafond, G. P.; Austenson, H. M.

doi:10.4141/cjps94-012

Cited by 11 publications

(5 citation statements)

References 19 publications

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“…Although the correlation between FSI and CMC was highly significant (P = 0.01) for group B (r = -0.649), the correlation between FSI and CMC for Group A was not. Gusta et al (1994) did not observe a strong relationship between CMC and LT 50 for the winter wheat cultivars of Norstar and Norwin treated with various plant growth regulators. Similarly, Yoshida et al (1997) found no relationship between freezing tolerance and CMC in 15 winter wheat cultivars that had a wide range in freezing tolerance.…”

Section: Resultsmentioning

confidence: 65%

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A re-evaluation of controlled freeze-tests and controlled environment hardening conditions to estimate the winter survival potential of hardy winter wheats

Gusta¹,

O’Connor²,

Gao³

et al. 2001

Can. J. Plant Sci.

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S. 2001. A re-evaluation of controlled freeze-tests and controlled environment hardening conditions to estiomate the winter survival potential of hardy winter wheats. Can. J. Plant Sci. 81: 241-246. To identify superior winter-hardy winter wheat genotypes it is essential to have a reliable screening method that can detect small differences in freezing tolerance. A highly significant correlation was obtained between the minimum temperature tolerated by fully cold-hardened seedlings and the field survival index for 36 winter wheat cultivars with freezing tolerance varying from -13°C to -23°C. On the basis of their long-term field survival under cold stress, these cultivars represent two separate genotypic groups, semi-cold-hardy (Group A) and very cold-hardy (Group B). The correlation coefficient between minimum survival temperature and winter survival for the semi-hardy genotypes was not significant, although it was significant for the hardy genotypes (coefficient of determination was 25.9%). However, the minimum survival freeze test did not differentiate genotypes that varied widely in field survival. In comparing the very hardy winter genotypes (e.g., Norstar, Alabaskaja, Roughrider, etc.), no significant correlation was observed between either minimum survival temperature or crown moisture content. The freezing tolerance of 33 winter wheat genotypes was compared for seedlings naturally cold acclimated and for seedlings grown either in soil or hydroponically and hardened in a controlled environment chamber. On average, soil-grown seedlings, cold acclimated in a controlled environment were more freezing tolerant than seedlings acclimated naturally or grown hydroponically and acclimated in a controlled environment. Several semi-winter-hardy genotypes attained a freezing tolerance equivalent to that of very hardy winter genotypes when acclimated in a controlled environment chamber. Thus, it is possible to overestimate the freezing tolerance of seedlings acclimated in a controlled environment. Les phytogénéticiens ont besoin d'une méthode de présélection fiable pour déceler les petites variations de tolérance au gel qui les aideront à identifier les meilleurs cultivars de blé d'hiver rustique en ce qui concerne la résistance aux conditions hivernales. Les auteurs ont noté une corrélation très significative entre la plus basse température que supportent les plants totalement acclimatés au froid et l'indice de survie au champ chez trente-six cultivars de blé d'hiver dont la tolérance au gel variait de -13°C à -23°C. Selon leur taux de survie au champ à long terme au stress causé par le froid, les cultivars se divisent en deux groupes, ceux à génotype semi-résistant (groupe A) et ceux à génotype très résistant (groupe B). Le coefficient de corrélation entre la température de survie la plus basse et le taux de survie à l'hiver n'était pas significatif pour les cultivars du premier groupe mais bien pour ceux du second (coefficient de détermination de 29,5 %). Le test de survie minimum au gel ne permet toutefois pas de ...

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Section: Resultsmentioning

confidence: 65%

“…Prolonged periods of temperatures near -15°C during mid-winter have been identified as the primary cause of winterkill in winter wheat seedlings grown in western Canada (Gusta et al 1994). During this cold period, winter wheat seedlings lose their fall-acquired freezing tolerance and are killed due to freeze-induced desiccation (Gusta et al 1997).…”

mentioning

confidence: 99%

A re-evaluation of controlled freeze-tests and controlled environment hardening conditions to estimate the winter survival potential of hardy winter wheats

Gusta¹,

O’Connor²,

Gao³

et al. 2001

Can. J. Plant Sci.

Self Cite

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“…Anderson et al (1985) reported tetcyclasis applied as a seed treatment improved the survival of winter oat (Avena sativa L.) by reducing the length of the subcrown internode. Gusta et al (1994) applied β-(4chlorophenyl)-3,4,5,9,10-pentaaza-tetracyclo-5,4,1,0 2,6 ,0 8,11 -dodeca-3,9-diene (Baytan; triadimenol); 1-N-propyl-N-[2-(2,4,6trichlorophenoxy)-ethyl] (Sportak; prochloraz), alone or in combination with 1-[2,4-dichlorophenyl-2-(propanyloxy)ethyl]1H-imidazole nitrate (imazalil); 5-(4-chlorophenyl)-3,4,5,9,10-pentaaza-tetracyclo-5,4,1,0 2,6 ,0 8,1 ]dodeca-3,9-diene (Bas-106W; tetcylasis); and 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide (Vitavax; carbathiim) to seeds of a semidwarf and a tall-type winter wheat. None of the treatments increased the freezing tolerance of the crowns, and several rates of the treatments reduced both freezing tolerance and winter survival.…”

Section: Synthetic Plant Growth Regulatorsmentioning

confidence: 99%

Recent Advances in Plant Response to Mechanical Stress: Theory and Application

Mitchell¹

1996

HortSci

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“…Auxins such as indole-3-acetic acid (IAA), indole-3-butyric acid (IBA), α-naphthalene acetic acid (NAA), and 2,4-dichlorophenoxy acetic acid (2,4-D) are used for the induction and improvement of rooting either by application through foliar spray or as a seed treatment [1,2]. The 2,4-D treatment of seeds caused a substantial increase in root biomass and led to a significant improvement in the number of productive tillers, yields of straw and grain, and protein content of wheat grown in saline soil [3].…”

Section: Introductionmentioning

confidence: 99%

Stability of 4,4,4-Trifluoro-3-(indole-3-)butyric Acid Dissolved in Water on Growth of Rice Roots

Zhang

Sasakawa

2012

AMR

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The stability of 4,4,4-trifluoro-3-(indole-3-) butyric acid (TFIBA) were examined. Elongation of rice seminal root was promoted approximately 80% by continuous supply of 10-5 molL-1 TFIBA. Such promotion effect on root elongation is not found in IAA or IBA. The promotive effect of TFIBA on root elongation was not reduced by either direct heating in a microwave oven or autoclaving at 121°C for 15 min and root elongation was promoted by 70 - 80% at the concentration of 10-5 mol L-1. The effect of TFIBA was not lost by heat of microwave oven or autoclave. Although the effect of TFIBA dissolved in water was gradually lost at 30°C in the light, it was maintained at 4°C in the light and at 30°C in the dark. Consequently, aqueous solution of TFIBA can be stored at room temperature for at least 1 month when it is kept in the dark.

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The effect of fungicides and plant growth regulators applied as a seed treatment on the freezing tolerance of winter wheat

Cited by 11 publications

References 19 publications

A re-evaluation of controlled freeze-tests and controlled environment hardening conditions to estimate the winter survival potential of hardy winter wheats

A re-evaluation of controlled freeze-tests and controlled environment hardening conditions to estimate the winter survival potential of hardy winter wheats

Recent Advances in Plant Response to Mechanical Stress: Theory and Application

Stability of 4,4,4-Trifluoro-3-(indole-3-)butyric Acid Dissolved in Water on Growth of Rice Roots

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