INITIAL GROWTH OF Dipteryx alata PLANTS UNDER WATER DEFICIT

Abstract

The objective of this study was to analyze the effect of water deficit stress on the growth of Dipteryx alata plants. The experiment was carried out on a bench in full sun at the Goiás State University experimental unit, in Ipameri town, Goiás. Dipteryx alata seeds were collected from native plants in that municipality and sown in four-liter pots containing a mixture of soil, sand and cattle manure at ratio 3:1:0.5, respectively. The experiment was set up following the completely randomized design with five treatments (plants irrigated for 25 days with water volumes corresponding to 0%, 25%, 50%, 75%, and 100% of daily evapotranspiration) and six replicates. Treatments were applied when the plants were 60 days old, and at 85 days the plants were assessed for the following parameters: plant height, stem diameter, number of leaves, foliar chlorophyll concentration (a+b ), total carotenoids, relative water content, transpiration, leaf, stem and root mass ratios, and total biomass. During early development, the Dipteryx alata plants were highly sensitive to water deficit, significantly slowing down vegetative growth. Accordingly, in order to remain alive, the plants drastically reduced transpiration as a result of high stomatal sensitivity.

WATER-RETAINING POLYMER MITIGATES THE WATER DEFICIT IN Schinus terebinthifolia: PHOTOSYNTHETIC METABOLISM AND INITIAL GROWTH

“…Similarly, other species found in Cerrado phytophysiognomies, such as Hymenaea courbaril L. (Freitas et al, 2018) and Dipteryx alata Vogel. (Matos et al, 2018), also showed a reduction in chlorophyll content as a consequence of lower water availability in the soil. The number of leaves did not vary in T0 and 1 st P0 periods regardless of the water regime (Figure 3b).…”

Crescimento e qualidade de mudas de baru em reposta a hidroretentor e água magnetizada

“…A não diferença observada nas matérias secas e razões de matéria seca em função dos tratamentos pode ser atribuída à elevada plasticidade fenotípica da Dipteryx alata Vog resultando na aclimatação e adaptabilidade das mudas [4,36,37,38].…”

Arbuscular mycorrhizae alleviate water deficit in Dipteryx alata Vogel: seedling quality and resilience

“…Generally, D. alata plants are found in areas with humid and well-drained soils (Vera and Souza, 2009). However, natural or anthropic climatic fluctuations occur in several tropical and subtropical areas, promoting long drought periods (Matos et al, 2018) that significantly reduce soil water availability, limiting seedling survival and development in the initial phase in these phytoecological regions. Thus, knowledge on ecophysiological responses considering the natural habitat of D. alata is essential for decision making regarding its most appropriate management.…”

“…D. alata has shown sensitivity to water deficit since it reduces photosynthetic pigment content, transpiration and vegetative growth, in addition to increasing the activity of antioxidant enzymes (Maltarolo et al, 2016;Matos et al, 2018). We aim to evaluate the potential of inoculation of AMF to alleviate the effect of water deficit and contribute to the resilience of D. alata seedlings, in order to test the hypothese that AM could optimize hardening in D. alata during and after water deficit by increasing the efficiency of water relations and seedling quality.…”