Abstract
BackgroundTwo field experiments were carried out in Researches and Production Station of National Research Centre, Al-Nubaria District, Al Behaira Governorate, Egypt. To study the effect of indole acetic acid (IAA) and /or gibberellic acid (GA3) on growth, photosynthetic pigments, yield, and chemical composition of mungbean seeds, different concentrations of IAA and/or GA3 were used.ResultsResults indicated that all treatments caused significant increases in morphological criteria, biochemical parameters, and yield of mungbean plants. IAA or GA3 with 50 mg/l concentration recorded the best values growth photosynthetic pigments, as well as, endogenous auxins, GA3, and cytokinins. Interaction of IAA 50 mg/l + GA3 50 mg/l gave the most effective treatment. The superiority of treatment IAA 50 mg/l, GA3 50 mg/l, and interaction of IAA 50 mg/l + GA3 50 mg/l recorded the same trend due to yield and yield components in characters’ plant height, pods no./plant, pods weight/plant, seeds no./pod, seed yield, straw yield, biological yield, total carbohydrates, protein in seeds (%), and N in seeds (%).ConclusionIt could be concluded that foliar spray of 50 mg/l IAA + 50 mg/l GA3 was the most effective treatment on increasing growth and yield of mungbean.
Highlights
Seeds of mungbean were soaked for 12 h in different concentrations of bioregulator indole acetic acid (IAA) and/or gibberellic acid (GA3) with different concentrations as follows: (1) Control (IAA 0.0 mg/l, Gibberellic acid (GA3) 0.0 mg/l); (2) IAA 25 mg/l; (3) IAA 50 mg/l; (4) GA3 25 mg/l; (5) GA3 50 mg/l; (6) IAA 25 mg/l + GA3 25 mg/l; (7) IAA 25 mg/l + GA3 50 mg/l; (8) IAA 50 mg/l + GA3 25 mg/l; and (9) IAA 50 mg/ l + GA3 50 mg/l
IAA, Gibberellic acid (GA), and abscisic acid (ABA) contents were determined by gas–liquid chromatography (GLC) according to the method described by Wasfy and Orrin (1975) and cytokinin content was determined by high-performance liquid chromatography (HPLC) according to the method described by Muller and Hilgenberg (1986)
The obtained results show that application of the two growth regulators (IAA and GA3) individually (Table 2a, b) or in combination
Summary
Wilczek) is a summer pulse crop with short duration (70–90 days) and double use (forage and seed) and high nutritive value. Forage contains 12–18% protein but seeds contain 22–28% protein, 60–65% carbohydrates, 1–1.5% fats, 3.5–4.5% ash (El Karamany 2006). Mungbean is commonly used in cooking using green and mature pods. Sprouts are rich in vitamins and amino acids in broilers’ diets as untraditional feeding stuff or its husks as crop by-products for feeding rabbits (Omer et al 2017). Plant growth regulators (PGRs) are known to influence plant growth and development at very low concentrations. To study the effect of indole acetic acid (IAA) and /or gibberellic acid (GA3) on growth, photosynthetic pigments, yield, and chemical composition of mungbean seeds, different concentrations of IAA and/or GA3 were used
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