Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions.

ABSTRACT:

Background and aims

Retranslocation of iron (Fe) from source tissues enhances plant tolerance to Fe deficiency. Previous work has shown that silicon (Si) can alleviate Fe deficiency by enhancing acquisition and root to shoot translocation of Fe. Here the role of Si in Fe mobilization in older leaves and the subsequent retranslocation of Fe to young leaves of cucumber (Cucumis sativus) plants growing under Fe-limiting conditions was investigated.

Methods

Iron ((57)Fe or naturally occurring isotopes) was measured in leaves at different positions on plants hydroponically growing with or without Si supply. In parallel, the concentration of the Fe chelator nicotianamine (NA) along with the expression of nicotianamine synthase (NAS) involved in its biosynthesis and the expression

SUBMITTER: Pavlovic J 

PROVIDER: S-EPMC4970368 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature