Development of Epidendrum denticulatum (Orchidaceae) plants subjected to water deficit
DOI:
https://doi.org/10.21826/2446-82312025v80e20251194Parole chiave:
irrigation, orchid, survival, water deficiencyAbstract
Water deficit is one of the main abiotic stresses that negatively affect plant growth. This work aimed to evaluate the survival and development of Epidendrum denticulatum Barb. Rodr. plants under water stress. Six-month-old acclimatized plants from asymbiotic germination were subjected to the following treatments: daily irrigation, biweekly irrigation, and no irrigation. Variables of plant development and pigment production were evaluated after 75 and 150 days of cultivation under the above conditions. At 75 days, the survival ranged between 95 and 100% under the different irrigation regimes; however, the number of leaves and new roots decreased in plants irrigated fortnightly and not irrigated. At 150 days, survival ranged between 35% and 95% in plants not irrigated and irrigated daily, respectively. The effects on development were more severe at this stage, inhibiting the emission of new roots entirely and reducing the content of photosynthetic pigments. Despite this inhibition, the high survival after 75 days of irrigation interruption indicated that E. denticulatum is resistant to water deficit, tolerating the drought, and can be used to enrich areas of native vegetation.
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