Pedicel abscission and rachis morphology of soybean as influenced by benzylaminopurine and the presence of pods

Abstract

The cytokinin 6-benzylaminopurine (BAP) increases pod set of soybean Glycine max (L .) Merr . This study was performed to determine the effect of site and method of BAP application on pedicel abscission and the accompanying changes in rachis anatomy . Spraying racemes with BAP in solution, or applying in a lanolin suspension to proximal nodes on a rachis where proximal pedicels had been excised, delayed pedicel abscission at distal nodes . Applying BAP in lanolin to distal pedicels following flower excision failed to delay their abscission . BAP caused rachis swelling only when pods were present, but BAP could delay pedicel abscission either in the presence or absence of pods . These results suggest that rachis swelling following BAP treatment does not have a causal relationship to a delay or decrease of pedicel abscission .

The Impact of Auxin and Cytokinin on the Growth and Development of Selected Crops

“…This was confirmed by Pandey et al [94], who using synthetic auxin on cotton plants found a significant increase in the number and weight of flowers. A similar trend was observed by Qifu et al [112] and Kuang et al [109,113]. Using cytokinin, they reported better vascularization of plant tissues and an increase in the transport of photosynthesis products from vegetative to generative parts, which increased their concentration in generative organs, and consequently resulted in higher yield and better seed filling.…”

“…Kuang et al [109] and Peterson et al [110] suggest that plants respond positively to synthetic hormones because they affect physiological processes, especially an earlier increase in tissue vascularization, which manifests itself in the thickening of such morphological organs as stems, leaves, and inflorescences. According to Rylott and Smith [111], synthetic auxin and cytokinin increase plant yield and make generative organs competitive over vegetative ones.…”

Changes in the physiological activity of soybean (Glycine max L. Merr.) under the influence of exogenous growth regulators

“…An increase in seed yield of leguminous plants after using exogenous regulators was also shown by Czapla et al [38] who used IBA for soybean, Nowak et al [39] who used NAA (1-naphthaleneacetic acid) and BAP for field bean, and Barclay and McDavid [40] who used BAP for pea plants. An increased movement of assimilates from the vegetative parts is probably the reason for an increase in yields, as it leads to filling the seeds more efficiently and to the growth of the plant [15,16].…”

“…Some authors report increased photosynthesis and transpiration in various species after using auxin, e.g. in soybean [13,15,16], bean [17], cabbage [18], triticale [19], wheat [20], and barley [21]. In the opinion of many authors [22][23][24], exogenously used auxins and cytokinins have a significant influence on the condition of stomata, which are a gate for the transport of steam, carbon dioxide and oxygen to the interior of the leaf.…”

The effects of indole-3-butyric acid and 6-benzyloaminopuryn on Fabaceae plants morphometrics

“…In all three harvests statistically significantly lowest value was in the control. Kuang et al (1991) and Peterson et al (1990) suggested that the cause of a positive response to synthetic hormones are physiological changes in plants, especially the earlier increase in tissue vascularity, which manifests itself in thickening of some organs, such as stems, leaves, and inflorescences. According to Rylott and Smith (1990), a higher yield after synthetic auxin and cytokinin application caused at the same time the dominance of generative organs over vegetative.…”