Effect of Iron Deficiency on Root Ferric Chelate Reductase, Proton Extrusion, Biomass Production and Mineral Absorption of Citrus Root Stock Orange Jasmine (Murraya exotica L.)
Penulis/Author
Dr.Agr. Cahyo Wulandari, S.P., M.P. (1); Prof. Dr. Ir. Siti Subandiyah, M.Agr.Sc. (2); Yoshikuni masaoka (3)
Tanggal/Date
2014
Kata Kunci/Keyword
Abstrak/Abstract
Three-week iron (Fe) deficiency stress experiments were conducted using two citrus root stocks,
Fe-deficiency tolerant Orange Jasmine (OJ, Murraya exotica L.) and the sensitive Flying Dragon
[FD, Poncirus trifoliata var. monstrosa (T. Ito) Swingle]. Root ferric chelate reductase activity
and proton extrusion increased in OJ between 12 and 18 d of stress, whereas there was no change
in FD. Dry weight of OJ roots increased in contrast to FD which decreased. The Mn content in OJ
remained the same even under Fe stress. Zn content in OJ roots doubled while that of FD increased 4-
folds. The shoot/root Fe accumulation ratio increased in OJ while it decreased in FD. OJ apparently
has mechanisms for increasing root biomass, controlling Fe reutilization and regulating manganese
(Mn) and zinc (Zn) absorption in response to Fe deficiency. These mechanisms could help maintain
homeostasis under heavy metal stress, which would be useful for improved growth of economically
important citrus species.
Rumpun Ilmu
Ilmu Tanah
Bahasa Asli/Original Language
English
Level
Internasional
Status
Dokumen Karya
No
Judul
Tipe Dokumen
Aksi
1
CEK SIMILARITY-Effect of Iron Deficiency on Root Ferric Chelate Reductase (1).pdf
