Influence of the light on the morphophysiological responses of native trees species of the semidecidual stational forest

Respuestas de aclimatación de dos especies arbóreas del Matorral Espinoso Tamaulipeco en ambientes lumínicos heterogéneos

“…On the one hand, P. laevigata plants tended to grow higher from the beginning of the experiment under the light restriction imposed by the nets, showing a shade escape syndrome by stem elongation (Valladares & Niinemets, 2008). This result shows the preference of P. laevigata plants for a higher radiation environment, which is usually characteristic of pioneer species (Firmino et al, 2021). Shoot elongation is an important strategy to maximize light capture in competitive environments (Masarovičová et al, 2016), as has been observed in the tropical species Crescentia cujete L. (Piña & Arboleda, 2010); however, it involves spending reserves for cell elongation sacrificing resources for secondary growth (Nagashima & Hikosaka, 2011).…”

“…The absence of differences in growth or other functional attributes may be associated with a lower degree of plasticity to the light environment. For example, in plants of Machaerium brasiliense Vogel, even a shading level of 80 % had no effect on growth or other morphological variables, compared to plants growing in outdoor conditions (Firmino et al, 2021). Low plasticity in morphological characters is attributed to tolerant species; although, in the case of C. boissieri, the lack of differences only between plants grown in outdoors and those with intermediate shading (N40) could suggest an intermediate tolerance to shade.…”

“…ex Steud. (Firmino et al, 2021) and T. chrysotricha (Endres et al, 2010); however, biomass allocation contrasted only at the highest level of shade (N60). This suggests that, for C. boissieri, the intermediate shade condition (N40) was not a significant light restriction that would require alterations in its biomass allocation patterns.…”

“…elongación del tallo (Valladares & Niinemets, 2008). Este resultado muestra la preferencia que las plantas de P. laevigata tienen por un ambiente de mayor radiación, lo cual suele ser característico de especies pioneras (Firmino et al, 2021). La elongación del tallo es una estrategia importante para maximizar la captura de luz en ambientes de competencia (Masarovičová et al, 2016), como se ha observado en la especie tropical Crescentia cujete L. (Piña & Arboleda, 2010); sin embargo, implica gastos de reservas para la elongación celular sacrificando recursos para el crecimiento secundario (Nagashima & Hikosaka, 2011).…”

“…Mart (Moretti et al, 2019) or Torreya grandis Fortune ex Lindl (Tang et al, 2015), but they show tolerance to shade during their juvenile phase. However, there are other species with this same succession dynamics such as C. trichotoma, M. brasiliense and Triplaris americana L. (Firmino et al, 2021), in which leaf area modulation is not always observed, as they produce the same area in different light environments or, on the contrary, leaf area decreases with shading as occurs in P. dulce (Basave-Villalobos et al, 2022).…”