Book ChapterDOI
Why are young rice plants highly susceptible to iron deficiency
Reads0
Chats0
TLDR
The depletion of FeII in the shoot was induced and severe chlorosis rapidly developed in the young rice plant under Fe-deficiency, and the activity of the transporter which absorb deoxy-MA-FeIII chelate and finally reduced the synthesis of de oxygen-MA from methionine.Abstract:
The reason why young rice plant is highly susceptible to Fe-deficiency was clarified as follows: Among Gramineae plants rice secreted a very low amount of deoxy-MA as a phytosiderophore even under Fe-deficiency, and the secretion by rice ceased within 10 days under Fe-deficiency although barley secreted MAs during a period of more than one month. When iron depletion continued, the rice root tips become chimeric and epidermal cells became necrotic. The mitochondrial membrane systems in the cortex cells were also severely damaged. Iron starvation occurred even in the mitochondria, and energy charge in the root decreased. This reduced energy charge has firstly diminished the secretion activity of deoxy-MA from the roots, secondly reduced the activity of the transporter which absorb deoxy-MA-FeIII chelate and finally reduced the synthesis of deoxy-MA from methionine. Consequently, the depletion of FeII in the shoot was induced and severe chlorosis rapidly developed in the young rice plant under Fe-deficiency.read more
Citations
More filters
Journal ArticleDOI
Maize yellow stripe1 encodes a membrane protein directly involved in Fe(III) uptake.
Catherine Curie,Zivile Panaviene,Clarisse Loulergue,Stephen L. Dellaporta,Jean-François Briat,Elsbeth L. Walker +5 more
TL;DR: It is shown that ys1 is a membrane protein that mediates iron uptake, and is an important step in understanding iron uptake in grasses, and has implications for mechanisms controlling iron homeostasis in all plants.
Journal ArticleDOI
Metal movement within the plant: contribution of nicotianamine and yellow stripe 1-like transporters.
Catherine Curie,Gaëlle Cassin,Daniel Couch,Fanchon Divol,Kyoko Higuchi,Marie Le Jean,Julie Misson,Adam Schikora,Pierre Czernic,Stéphane Mari +9 more
TL;DR: Preliminary data on the YSL family of transporters clearly argues in favour of its role in the long-distance transport of metals through and between vascular tissues to eventually support gametogenesis and embryo development.
Journal ArticleDOI
Biofortification of durum wheat with zinc and iron
TL;DR: The HarvestPlus bio-fortification research program as discussed by the authors explored the genetic diversity of Fe and Zn concentrations in wild and synthetic parents to improve the nutritional quality of a variety of staple crops.
Journal ArticleDOI
Rice plants take up iron as an Fe3+-phytosiderophore and as Fe2+.
Yasuhiro Ishimaru,Motofumi Suzuki,Takashi Tsukamoto,Kazumasa Suzuki,Mikio Nakazono,Takanori Kobayashi,Yasuaki Wada,Satoshi Watanabe,Shinpei Matsuhashi,Michiko Takahashi,Hiromi Nakanishi,Satoshi Mori,Naoko K. Nishizawa +12 more
TL;DR: Analysis using the positron-emitting tracer imaging system showed that rice plants are able to take up both an Fe3+-phytosiderophore and Fe2+, indicating that rice possesses a novel Fe-uptake system that directly absorbs the Fe2+, a strategy that is advantageous for growth in submerged conditions.
Journal ArticleDOI
Micronutrient Nutrition of Plants
TL;DR: This review briefly summarizes the current knowledge of micronutrients in plants and presents some new speculations on the mechanisms ofmicronutrient uptake and translocation in plants.
References
More filters
Journal ArticleDOI
NATURALLY OCCURRING IRON-CHELATING COMPOUNDS IN OAT-AND RICE-ROOT WASHINGS : I. Activity Measurement and Preliminary Characterization
TL;DR: The root washings of water-cultured oat and rice (non-sterile) contained some sort of amphoteric, iron-solubilizing chelating (or complexing) compound(s), which could be separated into a "cationic fraction" by elution in a cation exchanger column with in NH4OH as discussed by the authors.
Journal ArticleDOI
Methionine as a Dominant Precursor of Phytosiderophores in Graminaceae Plants
Satoshi Mori,Naoko K. Nishizawa +1 more
TL;DR: Since the discovery (Takagi 1972) and determination of the chemical structure of phytosiderophores (Takemoto et al. 1978), many investigators studying Fe-deficiency have been very interested in knowing the precursor amino acid for phytesiderophore synthesis.
Journal ArticleDOI
Genotypical differences among graminaceous species in release of phytosiderophores and uptake of iron phytosiderophores
Volker Römheld,Horst Marschner +1 more
TL;DR: The results indicate that release of PS and subsequent uptake of FePS are under different genetic control, and attention should be paid to the effects of iron nutritional status and daytime on PS release as well as on rapid microbial degradation of PS.
Journal ArticleDOI
Sugar, Amino Acid and Inorganic Contents in Rice Phloem Sap :
Journal ArticleDOI
Efficiency of iron extraction from soil by mugineic acid family phytosiderophores
TL;DR: Several chelators including EDTA, DTPA, deferriferrioxamine B (FOB), mugineic acid (MA), and 2'−deoxymugineic acids (DMA) were tested for their ability to extract Fe from different soil samples as discussed by the authors.