Silicon Application in Cultivated Rices (Oryza sativa L and Oryza glaberrima Steud) Alleviates Iron Toxicity Symptoms Through the Reduction in Iron Concentration in the Leaf Tissue

2013 ◽  
Vol 200 (2) ◽  
pp. 132-142 ◽  
Author(s):  
I. Dufey ◽  
S. Gheysens ◽  
A. Ingabire ◽  
S. Lutts ◽  
P. Bertin
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Iron Concentration ◽  
Leaf Tissue ◽  
Iron Toxicity ◽  
Oryza Glaberrima

scholarly journals Morphological variation of iron toxicity tolerance in lowland rice (Oryza sativa L.) varieties

2022 ◽  
Vol 13 (1) ◽  
pp. 038-046
Author(s):  
Zipporah Page ◽  
David P Tokpah ◽  
Khady N Drame ◽  
Zogbo Luther ◽  
Victor M Voor ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Plant Height ◽  
Oryza Sativa L ◽  
Iron Concentration ◽  
Iron Toxicity ◽  
Rice Production ◽  
Yield Potential ◽  
Root Weight ◽  
Number Of Leaves ◽  
Shoot Weight

Rice (Oryza sativa L.) is a staple food crop in many countries in Africa. Africa consumes 11.6 million tons of rice per annum and out of 39 rice-producing countries, 21 import 50% to 99% of their rice requirements. The inability to reach the yield potential that would sustain Africa’s need for rice is due to many biotic and abiotic constraints that rice production faces. In lowland grown rice, one of the abiotic factors hindering rice production is iron toxicity. Excess uptake of ferrous (Fe2+) ions leads to a physiological stress, which results, into poor production. The current study aimed at selection of varieties tolerant to iron toxicity and assessment of the genetic diversity linked to this trait. In a hydroponic experiment conducted in a screen house at Africa Rice Centre in Dar es Salaam, 32 rice varieties were evaluated for tolerance to iron toxicity. The experiment was laid out in a split plot design with iron concentration as the main plot factor and variety as the sub plot factor. Two levels of iron concentration were used: 2 ppm and 300 ppm of Fe2+ as control and test concentrations, respectively. Traits observed to gauge tolerance were leaf bronzing (an indicator of iron toxicity), plant height, tillering, number of leaves, shoot weight (above ground), root length and root weight. The varieties ARICA8, and CK801 were found to be tolerant due to low bronzing indices, higher shoot weight, more number of leaves and lack of significant variation in morphology between the two Fe treatments except for the plant height. Correlation analysis depicted negative correlation between leaf bronzing and the other traits measured especially shoot biomass.

QTLs for nutritional contents of rice seedlings (Oryza sativa L.) in solution cultures and its implication to tolerance to iron-toxicity

2005 ◽  
Vol 275 (1-2) ◽  
pp. 57-66 ◽  
Author(s):  
Akifumi Shimizu ◽  
Corinta Q. Guerta ◽  
Glenn B. Gregorio ◽  
Shinji Kawasaki ◽  
Hiroshi Ikehashi
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Iron Toxicity ◽  
Rice Seedlings ◽  
Solution Cultures

Iron homeostasis in tropical indica rice (Oryza sativa L.) cultivars having contrasting grain iron concentration

2016 ◽  
Vol 25 (4) ◽  
pp. 382-391
Author(s):  
Binay Bhusan Panda ◽  
Srigopal Sharma ◽  
Pravat Kumar Mohapatra ◽  
Avijit Das
Keyword(s):  
Oryza Sativa ◽  
Iron Homeostasis ◽  
Oryza Sativa L ◽  
Indica Rice ◽  
Iron Concentration

Iron Toxicity in Rice (Oryza sativa L.), under Different Potassium Nutrition

2008 ◽  
Vol 7 (3) ◽  
pp. 251-259 ◽  
Author(s):  
Pooyan Mehraban ◽  
Ahmad Abdol Zade ◽  
Hamid Reza Sadeghipou
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Iron Toxicity ◽  
Potassium Nutrition

Incorporation of dolomite reduces iron toxicity, enhances growth and yield, and improves phosphorus and potassium nutrition in lowland rice (Oryza sativa L)

2016 ◽  
Vol 410 (1-2) ◽  
pp. 299-312 ◽  
Author(s):  
L.D.B. Suriyagoda ◽  
D.N. Sirisena ◽  
K.A.T.N. Somaweera ◽  
A. Dissanayake ◽  
W.A.J.M. De Costa ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Iron Toxicity ◽  
Lowland Rice ◽  
Growth And Yield ◽  
Potassium Nutrition ◽  
Phosphorus And Potassium

Novel genes are enriched in normalized cDNA libraries from drought-stressed seedlings of rice (Oryza sativa L. subsp. indica cv. Nagina 22)

Genome ◽  
2002 ◽  
Vol 45 (1) ◽  
pp. 204-211 ◽  
Author(s):  
Arjula R Reddy ◽  
W Ramakrishna ◽  
A Chandra Sekhar ◽  
Nagabhushana Ithal ◽  
P Ravindra Babu ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Cdna Library ◽  
Oryza Sativa L ◽  
Leaf Tissue ◽  
Cdna Libraries ◽  
Cytochrome P450 Enzymes ◽  
Novel Genes ◽  
Shock Proteins ◽  
Expressed Sequence

We have utilized an efficient method to enrich cDNA libraries for novel genes and genes responsive to drought stress in rice (Oryza sativa L. subsp. indica). We separately constructed standard and normalized cDNA libraries from leaf tissue of rice seedlings grown under controlled drought stress. Sequencing from the 3' end was performed on 1000 clones from the normalized leaf cDNA library and 200 clones from the standard leaf cDNA library. For the first 200 clones, the clone redundancy in the non-normalized library was about 10%, compared with 3.5% in the normalized cDNA library. Comparison of these cDNAs with the sequences in public databases revealed that 28.2% of the expressed sequence tags (ESTs) from the normalized library were novel. Clones from the standard and normalized leaf libraries and a root library uncovered numerous cDNAs that are highly homologous to known drought-responsive genes including those that encode metallothioneins, late embroyonic abundant (LEA) proteins, heat-shock proteins, cytochrome P450 enzymes, catalases, peroxidases, kinases, phosphatases, and transcription factors.Key words: Oryza sativa L., drought tolerance, normalization, ESTs, redundancy, cDNA library.

scholarly journals Growth of an Annual Strain of Oryza glaberrima Steud. and a Perennial Cultivar of Oryza sativa L. after Heading.

1994 ◽  
Vol 63 (4) ◽  
pp. 632-637 ◽  
Author(s):  
Yasuo TAKASAKI ◽  
Yoichi SEKI ◽  
Hirosi NOJIMA ◽  
Akihiro ISODA
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Oryza Glaberrima

Effect of fertilization on exudation, dehydrogenase activity, iron-reducing populations and Fe++ formation in the rhizosphere of rice (Oryza sativa L.) in relation to iron toxicity

1984 ◽  
Vol 79 (3) ◽  
pp. 305-316 ◽  
Author(s):  
G. Benckiser ◽  
S. Santiago ◽  
H. U. Neue ◽  
I. Watanabe ◽  
J. C. G. Ottow
Keyword(s):  
Oryza Sativa ◽  
Dehydrogenase Activity ◽  
Oryza Sativa L ◽  
Iron Toxicity
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