Ação De Biorreguladores Na Qualidade E Fisiologia De Sementes E Plântulas De Girassol

Junqueira, Isa Assumpção; Nicchio, Bruno; Deus, Marília Bernardes de; Lana, Regina Maria Quintão

doi:10.12661/pap.2017.004

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Utilizando o mesmo bioestimulante dessa pesquisa, na cultura do girassol, Junqueira et al (2017) observaram relação direta entre o aumento da massa seca de plântulas e da dose do produto, semelhante ao resultado encontrado na temperatura de 20°C. O incremento de massa seca das raízes deve-se a presença de giberelinas que participam ativamente do crescimento das células radiculares (KERBAUY, 2004) e segundo McDonald & Khan (1983), estes hormônios influenciam o metabolismo proteico, aumentando a taxa de síntese de proteínas nas sementes.…”

Section: Resultsunclassified

Initial development of millet with use of biostimulant under different temperatures

Diesel¹,

Silva²

2020

Sci. Elec. Arch.

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Millet is an important summer grass used as forage grass due to good bromatological characteristics and easy adaptation to Brazilian environmental conditions. However, when sowing the crop early in the southern region, situations may occur where low temperatures affect germination and seedling development. Thus, the present work had the objective of evaluating the germination and initial development of millet using Biozyme TF® biostimulant as a way to attenuate the effects of different temperatures. The experimental design was completely randomized, in a factorial scheme 3 x 5 (temperatures x doses) with four replicates each. The temperatures used were 15 °C, 20 °C and 25 °C and the doses used were: 0 (control); 0.25; 0.5; 0.75 and 1 ml kg-1. After the treatment, the seeds were evaluated by: germination test, germination speed index, shoot and root length and seedling dry mass. The data obtained were submitted to analysis of variance with Sisvar® software and, when found significant, the regression analysis was performed. The germination of millet seeds is favored, under low temperature stress conditions, with seed treatment at the dose of 0.50 ml kg-1 of biostimulant. The biostimulant does not influence millet germination speed index. Under low temperature thermal stress the biostimulant minimally increases the length and dry mass accumulation of millet seedlings and attenuates the negative effects on root growth. The accumulation of dry mass of the roots decreased with increasing dose of the biostimulant under thermal stress condition.

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Section: Resultsunclassified

Initial development of millet with use of biostimulant under different temperatures

Diesel¹,

Silva²

2020

Sci. Elec. Arch.

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“…In addition, turmeric has antioxidant action, which may have favored the defense system of the seedlings in the possible situation of water deficit caused by the dry powder. Junqueira et al (2017), showed that the use of bioregulator is favorable in the initial start of the seedling and increases the water content in the leaves, in addition to raising the levels of antioxidants for the defense system. Hermes et al (2015), indicate the use of biostimulant via seeds to obtain higher values of fresh mass.…”

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confidence: 99%