The Effect of Low Temperature Pre-Sowing Treatment on the Germination Performance and Membrane Integrity of Artificially Aged Tomato Seeds

-To investigate the allelopathic influence of soil incorporated plant residues of alligatorweed on emergence and seedling growth of maize (Zea mays), an experiment was conducted under laboratory conditions in the 2014-15 period. The effect of soil amended with whole plant residues of alligatorweed at different concentrations (1, 2, 3, 4 and 5% on w/w basis) was compared with residue free soil (control). Emergence traits, such as emergence percentage, time to 50% emergence, mean emergence time and emergence index were negatively influenced by weed residue incorporation as compared with weed residue free soil. Alligatorweed residues also exerted a pronounced negative influence on root and shoot lengths, root and shoot dry weights and seedling vigor index of the maize crop. The results revealed that the inhibitory effect was directly proportional to the increasing concentrations (1, 2, 3, 4 and 5%) of the weed residues as compared to control treatment. It was observed that soil infested with 4% and 5% residues of alligatorweed caused a maximum reduction in emergence (76-87%), root and shoot lengths (58-73% and 42-61%), root and shoot dry weights (49-58% and 40-48%) and seedling vigor index (87-95%) of the maize crop. Chloro-genic acid, ferulic acid, 4-hydroxy-3-methoxybenzoic acid, trans-4-hydroxy 3-methoxy cinnamic acid, gallic acid, p-coumaric acid, querceitin and syringic acid were identified as water soluble phenolics in alligatorweed residue soil saturated solution. This study indicates that the allelopathic potential of alligatorweed may play an important role in suppressing maize seedling growth.Keywords: invasive weed, allelopathy, emergence, maize, weed residues, seedling growth. RESUMO -A fim de investigar a influência alelopática de resíduos vegetais de erva-de-jacaré incorporados no solo na emergência e no crescimento de plântulas de milho (Zea mays), foi conduzido um experimento em condições de laboratório no período 2014-15. O efeito do solo corrigido com resíduos vegetais inteiros de erva-de-jacaré em diferentes concentrações (1, 2, 3, 4 e 5% em uma razão p/p) foi comparado com o do solo livre de resíduos (controle

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“…where N is the final number of seeds that germinated and n i and n j were the cumulative number of seeds germinated by adjacent counts at times t i and t j when ni < N/2 < nj (Coolbear et al 1984, Farooq et al 2005. Germination was defined as the visible emergence of the radicle through the seed coat (Maguire 1962, Galmés et al 2006).…”

Section: Germination Testmentioning

confidence: 99%

Effects of hormonal priming on seed germination of pigeon pea under cadmium stress

Sneideris

Gavassi

Campos

et al. 2015

An. Acad. Bras. Ciênc.

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In this work we investigated whether priming with auxin, cytokinin, gibberellin, abscisic acid and ethylene, alters the physiological responses of seeds of pigeon pea germinated under water and cadmium stress. Seeds treated with water or non-treated seeds were used as control. Although compared to non-treated seeds we found that the hormone treatments improve the germination of pigeon pea under cadmium stress, however, these treatments did not differ from water. However, we also observed a trend of tolerance to the effects of cadmium in the presence of ethylene, suggesting that the use of this hormone may be an efficient method to overcome seed germination under metal stress.

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The Effect of Low Temperature Pre-Sowing Treatment on the Germination Performance and Membrane Integrity of Artificially Aged Tomato Seeds

Cited by 326 publications

References 12 publications

Germination Behaviour of 6 × 6 Diallel Hybrids of an Energy Crop Jatropha curcas L.

Germination Behaviour of 6 × 6 Diallel Hybrids of an Energy Crop Jatropha curcas L.

Suppression of Maize (Zea mays) Seedling Growth by Invasive Alligatorweed (Alternanthera philoxeroides) Residues

Effects of hormonal priming on seed germination of pigeon pea under cadmium stress

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