Open Access

ARTICLE

Differential Responses of Common Bean (Phaseolus vulgaris) Cultivars to Exogenous Indole-3-Butyric Acid Application

Gülay Zulkadir^*

Organic Agriculture Management of Department, Applied Technology and Management School of Silifke, Mersin University, Silifke/Mersin, 33900, Turkey

* Corresponding Author: Gülay Zulkadir. Email:

(This article belongs to the Special Issue: Integrated Nutrient Management in Cereal Crops)

Phyton-International Journal of Experimental Botany 2025, 94(7), 2117-2129. https://doi.org/10.32604/phyton.2025.066762

Received 16 April 2025; Accepted 19 June 2025; Issue published 31 July 2025

Abstract

Bean (Phaseolus vulgaris) is a globally important legume crop valued for its nutritional content and adaptability. Establishing a robust root system during early growth is critical for optimal nutrient uptake, shoot development, and increased resistance to biotic stress. This study evaluated the effects of exogenous indole-3-butyric acid (IBA) on root and shoot development in two bean cultivars, Onceler-98 and Topcu, during the seedling stage. IBA was applied at four concentrations: 0 (control), 50, 100, and 150 μM. Morphological parameters measured included root length (RL), root fresh weight (RFW), root dry weight (RDW), root nodule number (RNN), shoot length (SL), shoot fresh weight (SFW), and shoot dry weight (SDW). The experiment followed a randomized complete block design with four replications. Significant (p ≤ 0.05) and highly significant (p ≤ 0.01) differences were observed across treatments and cultivars. The results indicated that Onceler-98 generally responded more favorably to IBA application, with optimal growth performance observed at 100 μM. In contrast, Topcu was less responsive to IBA overall, and high concentrations—particularly 150 μM—tended to suppress nodule formation.

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Keywords

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