Adaptive advantages of wood anatomical-hydraulic features linked to sex in a tropical dioecious species
Por:
Beltran-Rodriguez, Leonardo, Romero-Manzanares, Angelica, Amparo Borja-de la Rosa, Ma, Ignacio Valdez-Hernandez, Juan, Luna-Cavazos, Mario, Blancas-Vazquez, Jose
Publicada:
1 feb 2022
Resumen:
Key message Anatomical traits and features of Amphipterygium adstringens
wood and hydraulic properties, both linked to sex, explain the
performance of the species in its ecological niche. Androic and gynoic
dioecious species respond structurally and functionally to the
environmental conditions where they live. How are adaptive advantages
manifested by each sex, from the anatomical water transport system to
gain hydraulic efficiency? How does the species use the ecological niche
by each sex in a dry competitive environment? Amphipterygium adstringens
is an endemic, dioecious tree in Mexico. We analyzed the morphometric
anatomical features of wood samples from trees to differentiate the
functionality of the xylematic system by sex. Physiological indices such
as relative hydraulic conductivity, vessel grouping, and vulnerability
were estimated. A discriminant analysis was carried out to differentiate
hydraulic efficiency by sex. The ecological niches of both sexes were
defined using Ripley's bivariate function. The sizes of the vessels and
fibers were significantly higher in the gynoecious wood samples than in
the androecious wood samples. Rays in the androecious wood samples were
larger than those in the gynoecious wood samples. There was a
significant difference between sexes in all the indices estimated. The
discriminant analysis showed that gynoecious trees have a better
functional response, are able to better adapt to drought, and have
higher water transport security. The spatial correlation pattern between
adults of both sexes showed independence. Hydraulic efficiency and
security are the key features of gynoecious tree survival, while
vulnerability to cavitation is a risk factor for androecious trees. The
performance of A. adstringens based on wood anatomical traits and
hydraulic properties revealed an advantage for gynoecious trees, and
susceptibility was linked to androecious trees.
Filiaciones:
Beltran-Rodriguez, Leonardo:
Colegio Postgrad, Campus Montecillo, Texcoco, Estado De Mexic, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Mexico City, DF, Mexico
Romero-Manzanares, Angelica:
Colegio Postgrad, Campus Montecillo, Texcoco, Estado De Mexic, Mexico
Amparo Borja-de la Rosa, Ma:
Univ Autonoma Chapingo, Div Ciencias Forestales, Texcoco, Estado De Mexic, Mexico
Ignacio Valdez-Hernandez, Juan:
Colegio Postgrad, Campus Montecillo, Texcoco, Estado De Mexic, Mexico
Luna-Cavazos, Mario:
Colegio Postgrad, Campus Montecillo, Texcoco, Estado De Mexic, Mexico
Blancas-Vazquez, Jose:
Univ Autonoma Estado Morelos, Ctr Invest Biodiversidad & Conservac, Cuernavaca, Morelos, Mexico
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