High Temperature and the Ethylene Antagonist 1-Methylcyclopropene Alter Ethylene Evolution Patterns, Antioxidant Responses, and Boll Growth in &lt;i&gt;Gossypium hirsutum&lt;/i&gt;

High temperatures during lettuce seed imbibition can delay or completely inhibit germination and the endosperm layer appears to restrict the radicle protrusion. The role of endo-beta-mannanase during lettuce seed germination at 35°C and the influence of ethylene in endo-beta-mannanase regulation were investigated. Seeds of 'Dark Green Boston' (DGB) and 'Everglades' (EVE) were germinated in water, or 10 mmol L-1 of 1-aminocyclopropane-1-carboxylic acid (ACC), or 10 mmol L-1 of aminoethoxyvinylglycine (AVG), or 20 mmol L-1 of silver thiosulphate (STS). Seeds were also primed in polyethylene glycol (PEG), or PEG + ACC, PEG + AVG, or PEG + STS. Untreated seeds germinated 100% at 20°C. At 35°C, EVE seeds germinated 100%, whereas DGB seeds germinated only 33%. Seed priming or adding ACC during incubation increased germination at 35°C. Higher ethylene evolution was detected in EVE than in DGB during germination at 35°C. AVG did not inhibit seed germination of DGB at 35°C, but STS did. Higher endo-beta-mannanase activity was observed in EVE compared with DGB seeds. Providing ACC either during priming or during germination increased endo-beta-mannanase activity, whereas AVG and STS led to decreased or no activity. Ethylene may overcome the inhibitory effect of high temperature in thermosensitive lettuce seeds due to increased endo-beta-mannanase, possibly leading to weakening of the endosperm.

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Exogenous Application of Putrescine Ameliorates the Effect of High Temperature in Gossypium hirsutum L. Flowers and Fruit Development

Journal of Agronomy and Crop Science ◽

10.1111/j.1439-037x.2009.00414.x ◽

2010 ◽

Vol 196 (3) ◽

pp. 205-211 ◽

Cited By ~ 16

Author(s):

A. C. Bibi ◽

D. M. Oosterhuis ◽

E. D. Gonias

Keyword(s):

High Temperature ◽

Gossypium Hirsutum ◽

Fruit Development ◽

Gossypium Hirsutum L ◽

Exogenous Application

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Growth and flowering of cotton (Gossypium hirsutum L.) as affected by daylength and temperature

The Journal of Agricultural Science ◽

10.1017/s0021859600061360 ◽

1977 ◽

Vol 89 (3) ◽

pp. 583-587 ◽

Cited By ~ 11

Author(s):

J. G. Bhatt

Keyword(s):

High Temperature ◽

Gossypium Hirsutum ◽

Vegetative Growth ◽

Upland Cotton ◽

Reproductive Growth ◽

Gossypium Hirsutum L ◽

Northern India ◽

Boll Weight ◽

Delayed Flowering

SummaryOver 14 h of daylight and high day temperature singly or in combination delayed flowering of the upland cotton J 34, whereas the photosensitive variety MCU 5 did not flower under long days alone or long days plus high temperature. These treatments promoted vegetative growth and made the plants tall and bushy. Though the treatments were discontinued 75 days after germination the subsequent reproductive growth was adversely affected with significant reduction in boll weight.The upland genotypes when grown at latitudes 29° N, 21° N and 11° N flowered progressively earlier and at lower nodes at more southerly latitudes because of reduction in daylength and temperatures. It is concluded that the upland cottons of northern India differ from classical types because daylength together with temperature appeared to determine flowering.

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Leaf Ethylene Evolution Level Following High-temperature Stress in Common Bean

HortScience ◽

10.21273/hortsci.25.10.1282 ◽

1990 ◽

Vol 25 (10) ◽

pp. 1282-1284 ◽

Cited By ~ 2

Author(s):

Karl J. Sauter ◽

David W. Davis ◽

Paul H. Li ◽

I.S. Wallerstein

Keyword(s):

Heat Stress ◽

High Temperature ◽

Phaseolus Vulgaris ◽

Genetic Variability ◽

Common Bean ◽

Electrolyte Leakage ◽

High Temperature Stress ◽

Ethylene Evolution ◽

Generation Means ◽

Generation Means Analysis

Yield in common bean, Phaseolus vulgaris L., can be significantly reduced by high temperature (I-IT) during bloom. Ethylene production from plant tissue increases as a consequence of various stresses, including heat stress. The inheritance of leaf ethylene evolution rate (EER) of HT-stressed (35/30C day/night) progenies from crosses among bean genotypes previously categorized as HT sensitive or tolerant, based on cell electrolyte leakage, was investigated. Evidence from generation means analysis of Fl, F2, and backcross progenies shows EER to be genetically controlled, with additive, dominance, and epistatic effects indicated for low EER. The range (0.62 to 2.52 μg-1·hr-1) of EER from field-grown lines and cultivars suggests the existence of considerable genetic variability. EER was associated (r = –0.70) with heat tolerance, as estimated by cell electrolyte; leakage.

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