@Article{phyton.2020.013801,
AUTHOR = {Dazhuang Qi, Meixia Liang, Fudong Jiang, Jianzhao Li, Xuqiang Qiao, Hongxia Zhang},
TITLE = {Effects of Exogenous Manganese (Mn) on Mineral Elements, Polyamines and Antioxidants in Apple Rootstock <i>Malus robusta</i> Rehd.},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {89},
YEAR = {2020},
NUMBER = {4},
PAGES = {943--955},
URL = {http://www.techscience.com/phyton/v89n4/40515},
ISSN = {1851-5657},
ABSTRACT = {Manganese (Mn) is one of the essential microelements in all organisms.
However, high level of Mn is deleterious to plants. In this study, the effects of exogenous manganese application on mineral element, polyamine (PA) and antioxidant
accumulation, as well as polyamine metabolic and antioxidant enzyme activities,
were investigated in <i>Malus robusta</i> Rehd., a widely grown apple rootstock. High
level of Mn treatments decreased endogenous Mg, Na, K and Ca contents, but
increased Zn content, in a Mn-concentration-dependent manner. Polyamine metabolic assays revealed that, except the content of perchloric acid insoluble bound
(PIS-bound) spermine, which increased significantly, the contents of putrescine
(Put), spermidine (Spd) and spermine (Spm) all decreased progressively, accompanied with the decreased activities of arginine decarboxylase (ADC, EC 4.1.1.19)
and ornithine decarboxylase (ODC, EC 4.1.1.17), and the increased activities of
diamine oxidase (DAO, EC 1.4.3.6) and polyamine oxidase (PAO, EC 1.5.3.3).
Further antioxidant capacity analyses demonstrated that contents of anthocyanin,
non-protein thiols (NPT) and soluble sugar, and the activities of guaiacol peroxidase
(POD, EC 1.11.1.7), catalase (CAT, EC 1.11.1.6) and superoxide dismutase (SOD,
EC 1.15.1.1), also increased upon different concentrations of Mn treatments. Our
results suggest that endogenous ion homeostasis is affected by high level of Mn
application, and polyamine and antioxidant metabolism is involved in the responses
of <i>M. robusta</i> Rehd. plants to high level of Mn stress.},
DOI = {10.32604/phyton.2020.013801}
}