Morphological, physiological and biochemical traits of Cordia trichotoma under phosphorous application and a water-retaining polymer

SHADING AS A DETERMINANT FACTOR FOR THE SURVIVAL AND GROWTH OF Cabralea canjerana IN SOUTHERN BRAZIL

“…These responses may be region and species-specific because, according to Araújo and Deminicis (2009) and Ritchie et al (2010), ideal values show F v /F m ratio between 0.7 and 0.8. The F v /F m results found in this study at the S-S station are in agreement with those described in the literature for native tree species in southern Brazil which have been reported to range from 0.55 to 0.7 (Turchetto et al, 2016;Aimi et al, 2017;Berghetti et al, 2020). The ETR values were lower than 300 µmol (electrons) m -2 s -1 (Ritchie et al, 2010), but with low values (S-S = 19.3 µmol m -2 s -1 ) when compared to the established upper limit, which suggests the electrons are being transported more slowly in the photosystem.…”

Root System Morphology of Ipê-Roxo Tree Grown in Soil Subjected to Phosphorus Application in Subtropical Climate Region

“…The consequence of this metabolic process is the increase in plant height [12]. Some research with plants of arboreal species cultivated with P increment showed a similar effect in growth [12,28].…”

“…Increased P absorption by roots also [31] stimulated ATP biosynthesis and assured higher photosynthetic rates, which contributed to the cell division and expansion in the shoot [28,31,32]. The consequence of this metabolic process is the increase in plant height [12]. Some research with plants of arboreal species cultivated with P increment showed a similar effect in growth [12,28].…”

“…Indeed, phosphorous fertilizer was applied close to the plants and probably, the P forms like H 2 PO 4 − e HPO 4 2− got close to the external surface of roots, mainly by diffusion, enhancing the absorption of P from the soil solution [33,34]. Thus, the longer root length observed in the 0-0.2 m soil layer, close to the zone enriched with P, enhanced the establishment and growth in height of plants [12,28], as observed by the positive correlation among variables, such as root length, diameter and volume, with plant height in the PCA.…”

“…However, soil-available P concentrations do not always meet plants' demands, especially in sites aimed at rapid wood growth and high yield [9,10]. Thus, it is necessary to apply phosphate fertilizers at seedling planting [10][11][12] to overcome this deficiency.…”