Tolerance of rice germplasm to zinc deficiency

Quijano-Guerta, C; Kirk, G. J. D.; Portugal, Arllet; Bartolome, Violeta; McLaren, Graham

doi:10.1016/s0378-4290(02)00034-5

Cited by 95 publications

(62 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This confirms earlier results with another set of genotypes (Quijano-Guerta et al, 2002) and is suggestive for common stress mechanisms. Citrate exudation rate significantly increased at Zn or P deficiency.…”

Section: Discussionsupporting

confidence: 92%

See 1 more Smart Citation

Organic Anion Exudation by Lowland Rice (Oryza sativa L.) at Zinc and Phosphorus Deficiency

2006

View full text Add to dashboard Cite

The objectives of this paper were to determine (1) if lowland rice (Oryza sativa L.) plants respond similarly to low zinc (Zn) and phosphorus (P) availability by increased root exudation of low-molecular weight organic anions (LMWOAs) and (2) if genotypic variation in tolerance to low soil supply of either Zn or P is related to LMWOA exudation rates. Exudation of LMWOAs can increase bioavailability of both Zn and P to the plant, through partly similar chemical mechanisms. We used seven lowland rice genotypes and showed in two experiments that genotypes that grow relatively well on a soil with low Zn availability also grow well on a sparingly soluble Ca-phosphate (r=0.80, P=0.03). We measured exudation rates of LMWOAs on nutrient solution and found that both Zn and P deficiency induced significant increases. Among the LMWOAs detected oxalate was quantitatively the most important, but citrate is considered more effective in mobilizing Zn. Citrate exudation rates correlated with tolerance to low soil levels of Zn (P=0.05) and P (P=0.07). In a low-Zn-field we found an increased biomass production at higher plant density, which is supportive for a concentration-dependent rhizosphere effect on Zn bioavailability such as LMWOA exudation. We, for the first time, showed that tolerance to low Zn availability is related to the capacity of a plant to exude LMWOAs and confirmed that exudation of LMWOAs must be regarded a multiple stress response.

show abstract

Section: Discussionsupporting

confidence: 92%

“…Previously it was suggested that Zn deficiency tolerant rice genotypes show at least moderate tolerance to P deficiency and vice versa (Quijano-Guerta et al, 2002). This inspired us to investigate if this multiple deficiency tolerance can be explained mechanistically by exudation of citrate and other LMWOAs.…”

Section: Introductionmentioning

confidence: 98%

Organic Anion Exudation by Lowland Rice (Oryza sativa L.) at Zinc and Phosphorus Deficiency

2006

View full text Add to dashboard Cite

show abstract

“…Zinc deficiency was first diagnosed in rice on calcareous soils of northern India (Yoshida and Tanaka, 1969). It was subsequently found to be a widespread phenomenon in lowland rice areas of Asia, and, next to nitrogen (N) and phosphorus (P) deficiency; Zn deficiency is now considered the most widespread nutrient disorder in lowland rice (Quijano-Guerta et al, 2002). High soil pH appears to be the main factor associated with the widespread Zn deficiency in the calcareous soils of the IndoGangetic plains of India and Pakistan (Qadar, 2002).…”

Section: Amanullahmentioning

confidence: 99%

Phosphorus and Zinc Interaction Influence Leaf Area Index in Fine vs. Coarse Rice (Oryza sativa L) Genotypes in Northwest Pakistan

Amanullah¹,

Inamullah²,

Shah³

et al. 2016

JPSP

View full text Add to dashboard Cite

Leaf area index (LAI) is a measure of leafiness per unit ground area and denotes the extent of photosynthetic machinery is an important growth and yield-determining factor because it is a major determinant of light interception and transpiration. Phosphorus (P) and zinc (Zn) are the most important factors affecting LAI of rice (Oryza sativa L.). A field experiment was conducted to assess the impact of phosphorus (0, 40, 80, 120 kg P/ ha) and zinc levels (0, 5, 10, 15 kg Zn/ha) on LAI of rice (O. sativa L.) genotypes (fine and coarse [Fakhr-e-Malakand and Pukhraj]). The experiment was conducted on farmer field at Batkhela, Malakadnd in Northwest Pakistan during summer 2011 and 2012. When combined over the 2 years, the data revealed that the highest LAI at three different growth stages (tillering, heading, and physiological maturity [PM]) was obtained with application of the highest P level (120 kg/ha) being at par with 80 kg P/ha, while the lowest LAI was recorded when P was not applied. Similarly, the highest LAI was obtained with application of the two higher Zn levels (10 and 15 kg Zn/ha), while the lowest LAI was recorded when Zn was not applied. In the case of rice genotypes, the highest LAI was obtained from Pukhraj than other two genotypes at all growth stages. The other two rice genotypes (Fakher-e-Malakand and Basmati-385) produced statistically similar LAI at different growth stages. The higher LAI of Pukhraj was attributed to its long and wider leaves that resulted in higher mean single leaf area, leaf area per tiller, per hill, and per square meter. The LAI was the highest at heading stage than at early (tillering) and later (PM) growth stages. The increase in LAI was attributed to the increase in tillers number and leaf area/hill. The increase in LAI showed a positive impact on crop growth rate, dry matter, and yield. Application of 120 kg P+10 kg Zn/ha to rice genotype Pukhraj was more beneficial in terms of higher LAI and productivity in the study area.

show abstract

“…Zinc deficiency often co-occurs with P deficiency, because the bioavailability of both elements decreases with increasing pH (Zhu et alcontrolled by adsorption reactions (Catlett et al 2002) and P can precipitate as Ca-phosphate (Weng et al 2011). Quijano-Guerta et al (2002) studied the tolerance of rice (Oryza sativa L.) germplasm to Zn deficiency. They showed that genotypes tolerant to Zn deficiency also have at least a moderate tolerance to P deficiency.…”

Section: Introductionmentioning

confidence: 99%

Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

2012

View full text Add to dashboard Cite

Aims Zinc (Zn) and phosphorus (P) deficiency often occurs at the same time and limits crop production in many soils. It has been suggested that citrate root exudation is a response of plants to both deficiencies. We used white lupin (Lupinus albus L.) as a model plant to clarify if citrate exuded by roots could increase the bioavailability of Zn and P in calcareous soils. Methods White lupin was grown in nutrient solution and in two calcareous soils in a rhizobox. Rhizosphere soil solution was sampled to determine citrate, metals and P. Based on the measured citrate concentrations, a soil extraction experiment with citrate as extractant was done. Results Absence of Zn triggered neither cluster root formation nor citrate exudation of white lupin grown in nutrient solution, whereas low P supply did. The maximum citrate concentration (∼1.5 mM) found in the cluster rhizosphere soil solution of one soil mobilized P, but not Zn. In the other soil the highest citrate concentration (∼0.5 mM) mobilized both elements. Conclusions White lupin does not respond to low Zn bioavailability by increasing citrate exudation. Such a response was observed at low P supply only. Whether Zn and P can be mobilized by citrate is soil-dependent and the possible controlling mechanisms are discussed.

show abstract

Tolerance of rice germplasm to zinc deficiency

Cited by 95 publications

References 10 publications

Organic Anion Exudation by Lowland Rice (Oryza sativa L.) at Zinc and Phosphorus Deficiency

Organic Anion Exudation by Lowland Rice (Oryza sativa L.) at Zinc and Phosphorus Deficiency

Phosphorus and Zinc Interaction Influence Leaf Area Index in Fine vs. Coarse Rice (Oryza sativa L) Genotypes in Northwest Pakistan

Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

Contact Info

Product

Resources

About