Male Populus cathayana than female shows higher photosynthesis and less cellular injury through ABA-induced manganese transporting inhibition under high manganese condition

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Chen , F , Shen , J , Min , D , Ke , L , Tian , X , Korpelainen , H & Li , C 2018 , ' Male Populus cathayana than female shows higher photosynthesis and less cellular injury through ABA-induced manganese transporting inhibition under high manganese condition ' , Trees : Structure and Function , vol. 32 , no. 1 , pp. 255-263 . https://doi.org/10.1007/s00468-017-1628-1

Title: Male Populus cathayana than female shows higher photosynthesis and less cellular injury through ABA-induced manganese transporting inhibition under high manganese condition
Author: Chen, Fugui; Shen, Juan; Min, Dou; Ke, Lixia; Tian, Xin; Korpelainen, Helena; Li, Chunyang
Contributor: University of Helsinki, Department of Agricultural Sciences
Date: 2018-02
Language: eng
Number of pages: 9
Belongs to series: Trees : Structure and Function
ISSN: 0931-1890
URI: http://hdl.handle.net/10138/307673
Abstract: High Mn poisoned male and female Populus cathayana. The toxicity could be alleviated by exogenous ABA application. Intriguingly, ABA granted higher resistance to males than to females under high Mn stress because ABA could induce more blocking of Mn translocation to leaf in males than in females. Abscisic acid (ABA) is involved in plants' adaptive responses to various environmental stresses. However, little is known about the sex-related detoxification of ABA in plants under excess manganese (Mn) conditions. To reveal potentially different ABA detoxification mechanisms between Populus cathayana males and females against excess Mn exposure, photosynthesis performance, Mn2+ concentrations and morphologic changes were investigated. High Mn stress led to a more severe chloroplast destruction and, thus, greater reduction in the photosynthesis of P. cathayana females when compared to males. Under high Mn conditions, Mn reallocated mainly to leaves in females, while in males, it was distributed equally to roots and leaves. With the application of ABA, photosynthesis was restored more in males and more integrated grana in males than in females. It should be noted that Mn concentrations in males were lower in leaves and higher in roots and stems than those in females when treated with the combination of Mn and ABA. Conclusively, due to the reduction of root-shoot Mn transportation induced by ABA in P. cathayana males, males experienced less physiological injuries than do females, which suggest that males possess greater ABA-inducible resistance to Mn stress than do females.
Subject: Abscisic acid
Mn toxicity
Dioecy
Poplar
Sexual differences
SEX-SPECIFIC RESPONSES
ABSCISIC-ACID
EXCESS MANGANESE
OSMOTIC-STRESS
PLANTS
ACCUMULATION
ARABIDOPSIS
TOLERANCE
RICE
DIMORPHISM
1183 Plant biology, microbiology, virology
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