Mini-cutting supports low-input clonal propagation of Piptadenia stipulacea under semi-arid conditions
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https://orcid.org/0000-0003-1329-9382
Abstract
Piptadenia stipulacea is a leguminous tree species native to the Caatinga with potential for ecological restoration in semi-arid environments, but information on its vegetative propagation remains limited. We evaluated sprouting dynamics in a seminal mini-garden and tested whether indole-3-butyric acid (IBA) improved adventitious rooting of mini- cuttings. We treated mini-cuttings with 0, 2,000, 4,000, and 6,000 mg L⁻¹ IBA and evaluated rooting, survival, growth, and biomass production. Sprout production varied over time and increased markedly at 90 days, indicating recovery of ministumps after successive pruning. IBA did not improve rooting, survival, growth, or biomass accumulation. The control treatment showed the highest mean rooting and survival values, while the highest IBA concentration reduced overall morphophysiological performance. Intermediate doses produced balanced responses but did not provide a consistent advantage over the absence of growth regulator. We concluded that P. stipulacea can be efficiently propagated by mini- cutting without exogenous auxin under the tested conditions. This response supports a low-input propagation protocol and may reduce operational costs for seedling production aimed at restoration programs in semi-arid regions.
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