Ecophysiological and seasonal responses of Fabaceae tree species growing in Amazonian degraded area Dataset Jaquetti et al. 2025

Description

The data presented for Photosynthesis, transpiration, stomatal resistance, dark respiration, intrinsic water use efficiency, mid-day leaf water potential, leaf area, nutrients concentrations and nonstructural carbohydrates were collected in the dry and rainy seasons. The experimental design consisted of 12 treatments were a combination of six tree legumes species under fertilization vs. unfertilized plants. The dataset presents individual values for the six studied Fabaceae species Cenostigma tocantinum Ducke, Senna reticulata (Willd.) H.S. Irwin & Barneby, Dipteryx odorata (Aubl.) Willd., Clitoria fairchildiana R.A. Howard., Inga edulis Mart., Acacia spp.. Data was collected in a degraded area of the Balbina Hydropower Dam Forest Restoration Program (1 ̊55’36”S, 59 ̊27’10”W) in Amazonas state, Brazil. The forest restoration experiment evaluated the effects of fertilization and seasonality on ecophysiological characteristics through analysis of variance.

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The maximum assimilation rate (Amax), dark respiration rate (Rd), transpiration rate (E), and stomatal conductance (gs) were measured with the portable photosynthesis system Li-6400, Li-Cor Inc., Lincoln, NE, USA. Leaf area (LA) was measured with a portable laser leaf area meter (CI-202, CID Bio-Science, WA, USA). Intrinsic water use efficiency (iWUE) was determined by the ratio between Amax/gs. The C and N concentrations (mass basis) were determined using a 2400 Series II CHNS/O Elemental Analyzer (PerkinElmer Inc., Waltham, MA, USA). The P contents were determined by spectrophotometry. The macro (K, Ca, and Mg) and micronutrients (Fe and Zn) contents were assessed using spectrophotometric atomic absorption (Perkin-Elmer 1100B, Uberlingen, Germany). Soluble sugars and starch were determined by the colorimetric method and phenol–sulfuric spectrophotometry at 490 nm (Ultrospec 2100 pro UV/visible, Amersham Biosciences, Cambridge, UK) (Dubois et al., 1956).

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