Alexa Quintero | National Learning Service - Colombia (Colombia Vocational Training Agency) (original) (raw)
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Papers by Alexa Quintero
Journal of Experimental Botany, 2005
Radial water (J V ) and abscisic acid (ABA) flows (J ABA ) through maize root seedlings have been... more Radial water (J V ) and abscisic acid (ABA) flows (J ABA ) through maize root seedlings have been investigated under different conditions of nutrient deficiency. Whereas J V was reduced under nitrogen deficiency, potassium deficiency stimulated J V . A substantial increase of J ABA was observed in roots kept under potassium deficiency. The observed changes of J V might have resulted from changed barrier properties of the endodermis. Nitrogen and potassium deficiency also caused an accumulation of endogenous ABA in root tissues. Under all conditions studied, except under K 1 -deficiency, external ABA (100 nM) caused an increase of J V . The data of this study were used to analyse the relations between internal and endogenous root ABA, J V , and J ABA . The internal ABA of root tissues was positively correlated with J V and was highly significant (P <0.001 for internal and P50.03 for endogenous root ABA) within the range 2-300 pmol g 21 FW. It was also highly positively correlated to the radial ABA flows. There was also a highly positive correlation between J V and J ABA . The data of this study indicate, for the first time, the relations between internal ABA, water, and ABA flows. Independent of treatment with external ABA, an ABA transport by solvent drag across the endodermis is confirmed.
Se sufre demasiado por amor, ésa es la verdad. Incluso los que se vanaglorian de estar perfectame... more Se sufre demasiado por amor, ésa es la verdad. Incluso los que se vanaglorian de estar perfectamente acoplados a su pareja, en lo más recóndito de su ser a veces albergan dudas, inseguridades o pequeños miedos anticipatorios respecto a su futuro afectivo. Nunca se sabe... ¿Quién no ha sufrido alguna vez por estar con la persona equivocada, por sentir un bajón en el deseo o simplemente por la caricia que nunca llegó? No hay nada más hipersensible que el amor, nada más arrebatador, nada más vital. Renunciar a él es vivir menos o no vivir.
Journal of Experimental Botany, 2005
Radial water (J V ) and abscisic acid (ABA) flows (J ABA ) through maize root seedlings have been... more Radial water (J V ) and abscisic acid (ABA) flows (J ABA ) through maize root seedlings have been investigated under different conditions of nutrient deficiency. Whereas J V was reduced under nitrogen deficiency, potassium deficiency stimulated J V . A substantial increase of J ABA was observed in roots kept under potassium deficiency. The observed changes of J V might have resulted from changed barrier properties of the endodermis. Nitrogen and potassium deficiency also caused an accumulation of endogenous ABA in root tissues. Under all conditions studied, except under K 1 -deficiency, external ABA (100 nM) caused an increase of J V . The data of this study were used to analyse the relations between internal and endogenous root ABA, J V , and J ABA . The internal ABA of root tissues was positively correlated with J V and was highly significant (P <0.001 for internal and P50.03 for endogenous root ABA) within the range 2-300 pmol g 21 FW. It was also highly positively correlated to the radial ABA flows. There was also a highly positive correlation between J V and J ABA . The data of this study indicate, for the first time, the relations between internal ABA, water, and ABA flows. Independent of treatment with external ABA, an ABA transport by solvent drag across the endodermis is confirmed.
Se sufre demasiado por amor, ésa es la verdad. Incluso los que se vanaglorian de estar perfectame... more Se sufre demasiado por amor, ésa es la verdad. Incluso los que se vanaglorian de estar perfectamente acoplados a su pareja, en lo más recóndito de su ser a veces albergan dudas, inseguridades o pequeños miedos anticipatorios respecto a su futuro afectivo. Nunca se sabe... ¿Quién no ha sufrido alguna vez por estar con la persona equivocada, por sentir un bajón en el deseo o simplemente por la caricia que nunca llegó? No hay nada más hipersensible que el amor, nada más arrebatador, nada más vital. Renunciar a él es vivir menos o no vivir.