To see a World in a Grain of Sand And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand And Eternity in an hour. William Blake (1757-1827)
miércoles, 2 de mayo de 2018
Plants can respond to underground communication when neighbors are stressed
. Aboveground mechanical stimuli affect belowground plant-plant communication Ali Elhakeem, Dimitrije Markovic, Anders Broberg, Niels P. R. Anten, Velemir Ninkovic
Plants can detect the presence of their neighbours and modify their
growth behaviour accordingly. But the extent to which this neighbour
detection is mediated by abiotic stressors is not well known. In this
study we tested the acclimation response of Zea mays L.
seedlings through belowground interactions to the presence of their
siblings exposed to brief mechano stimuli. Maize seedling simultaneously
shared the growth solution of touched plants or they were transferred
to the growth solution of previously touched plants. We tested the
growth preferences of newly germinated seedlings toward the growth
solution of touched (T_solution) or untouched plants (C_solution). The
primary root of the newly germinated seedlings grew significantly less
towards T_solution than to C_solution. Plants transferred to T_solution
allocated more biomass to shoots and less to roots. While plants that
simultaneously shared their growth solution with the touched plants
produced more biomass. Results show that plant responses to neighbours
can be modified by aboveground abiotic stress to those neighbours and
suggest that these modifications are mediated by belowground
"None of the human faculties should be excluded from scientific activity. The depths of intuition, a sure awareness of the present, mathematical profundity, physical exactitude, the heights of creative reason and sharpness of understanding, together with a versatile and ardent imagination and a loving delight in the world of the senses, they are all essential for a lively and productive apprehension of the moment." J. W. Goethe (1749 - 1832)
La orquídea de noche esconde en su perfume el blanco de su flor.
Yosa Buson (1716-1783)
Ecology has been eminently a descriptive science despite some pioneering work by theoreticians such as Lotka, Volterra, Nicholson, and others. Description is a first step toward understanding a system. However, such a first step needs to be accompanied by the development of a theoretical framework in order to achieve real insight and, whenever possible, predictive power.
Ricard V. Solé and Jordi Bascompte, 2006 (Self-Organization in Complex Ecosystems).
Animal Liberation Front
"Toda pregunta es siempre más que una pregunta, está probando una carencia, una ansiedad por llenar un hueco intelectual o psicológico, y hay muchas veces en que el hecho de encontrar una respuesta es menos importante que haber sido capaz de vivir a fondo la pregunta, de avanzar ansiosamente por las pistas que tiende a abrir en nosotros"
Julio Cortázar. Desafíos.
“If our means of investigation became more and more incisive, we would discover the simple under the complex, then the complex under the simple, then again the simple under the complex, and so on, without being able to predict which state would ultimately prevail” Jules Henri Poincaré (1854 –1912)