Seed storage period reduces aluminum tolerance in rice (Oryza sativa)

Alvim, Marina Neiva; Ramos, Flávia Toledo; França, Marcel Giovanni Costa

doi:10.15258/sst.2007.35.3.15

Cited by 4 publications

(5 citation statements)

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“…The germination behavior of the seeds of Caiapó was in agreement with that presented by Alvim et al (2007). The germination response to different concentrations of applied Al differs between plant species.…”

Section: Discussionsupporting

confidence: 86%

“…Hagenbeek et al (2000) showed that Al is able to mimic ABA effects in rice protoplasts by the activation of ABA-inducible promoters, and Alvim et al (2007) showed that in Caiapó rice, Al can be found in the aleurone layer when seeds are placed for imbibition in a solution containing this metal. In Arabdopsis thaliana, which has an aleurone layer very similar to those of cereal grains, Bethke et al (2007) demonstrated that NO is required for the transcription of gibberellins (GA) and coordinates a reduction in the ABA-imposed dormancy.…”

Section: Discussionmentioning

confidence: 99%

“…Such effect can be detected within a few minutes of exposure to this metal, which reportedly alters the cellular ultrastructure of corn, wheat, and rice (Eleftheriou et al, 1993;Ramos, 2003). Another Al effect has been shown recently (Alvim et al, 2007) whereby Al was capable of interfering with seedling establishment of rice by strongly reducing germination rate and the speed of early root growth. However, the extent of Al-induced damage is species-and cultivar-specific (Watanabe and Okada, 2005).…”

Section: Introductionmentioning

confidence: 95%

“…The possibility of a complex formation between SNP and Al was checked with UV-VIS, and no reaction was observed. The germination was conducted in a germination chamber at 30°C with a 12 h photoperiod and recorded daily for 7 d. The germination was defined as root protrusion to a length of at least 2 mm, and the delay in germination was determined by calculating the mean germination time according to Alvim et al (2007).…”

Section: Seed-germination Analysismentioning

confidence: 99%

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Nitric oxide reduces the stress effects of aluminum on the process of germination and early root growth of rice

Marciano

Ramos²,

Alvim

et al. 2010

Z. Pflanzenernähr. Bodenk.

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The present study examined the action of nitric oxide (NO) on the germination process of rice seeds and early root growth under aluminum (Al) stress. Seeds and seedlings of two rice genotypes, with different levels of sensitivity to aluminum stress, were examined after treatment with Al and NO or only with Al. Further, the histochemical localization of Al and NO was performed on the root tissues. In both genotypes, NO was able to neutralize the inhibitory Al effects on germination. In the roots of seedlings, a reduction of Al toxicity as mediated by NO was indicated by an increased root elongation and a reduction of Al accumulation on the root surface in the Al hematoxylin complexation, irrespective of the genotype. The histolocalization of NO in roots using diaminofluorescein diacetate (DAF-2DA) and confocal microscopy revealed endogenous Al-induced levels of NO. It is concluded that NO can alleviate Al stress in the seedlings of the studied rice genotypes by improving germination and early root growth and is likely to play a role in a specific stress-signaling pathway.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Seed-germination Analysismentioning

confidence: 99%

See 2 more Smart Citations

Nitric oxide reduces the stress effects of aluminum on the process of germination and early root growth of rice

Marciano

Ramos²,

Alvim

et al. 2010

Z. Pflanzenernähr. Bodenk.

View full text Add to dashboard Cite

show abstract

“…In Arabidopsis, chalazal suberin deposition also increases hardseededness [24]. Aged seeds are less tolerant than fresh seeds to aluminum toxicity upon germination, due to increased testa permeability caused by physical damage during storage time [33]. The ability of seeds to form a mucilage layer when wetted by night dew helps maintain seed viability under detrimental desert environment by enabling DNA repair [34].…”

Section: Role Of the Testa: Structure And Compositionmentioning

confidence: 99%

Seed longevity: Survival and maintenance of high germination ability of dry seeds

Rajjou

Debeaujon

2008

Comptes Rendus. Biologies

346

284

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The seed constitutes the main vector of plant propagation and it is a critical development stage with many specificities. Seed longevity is a major challenge for the conservation of plant biodiversity and for crop success. Seeds possess a wide range of systems (protection, detoxification, repair) allowing them to survive in the dry state and to preserve a high germination ability. Therefore, the seed system provides an appropriate model to study longevity and aging.

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Seeds’ physicochemical traits and mucilage protection against aluminum effect during germination and root elongation as important factors in a biofuel seed crop (Ricinus communis)

Silva

Ramos

Faria

et al. 2014

Environ Sci Pollut Res

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We determined the length, volume, dry biomass, and density in seeds of five castor bean cultivars and verified notable physicochemical trait differences. Seeds were then subjected to different toxic aluminum (Al) concentrations to evaluate germination, relative root elongation, and the role of root apices' rhizosphere mucilage layer. Seeds' physicochemical traits were associated with Al toxicity responses, and the absence of Al in cotyledons near to the embryo was revealed by Al-hematoxylin staining, indicating that Al did not induce significant germination reduction rates between cultivars. However, in the more sensitive cultivar, Al was found around the embryo, contributing to subsequent growth inhibition. After this, to investigate the role of mucilage in Al tolerance, an assay was conducted using NH4Cl to remove root mucilage before or after exposure to different Al concentrations. Sequentially, the roots were stained with hematoxylin and a quantitative analysis of staining intensity was obtained. These results revealed the significant contribution of the mucilage layer to Al toxicity responses in castor bean seedlings. Root growth elongation under Al toxicity confirmed the role of the mucilage layer, which jointly indicated the differential Al tolerance between cultivars and an efficient Al-exclusion mechanism in the tolerant cultivar.

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Seed storage period reduces aluminum tolerance in rice (Oryza sativa)

Cited by 4 publications

References 0 publications

Nitric oxide reduces the stress effects of aluminum on the process of germination and early root growth of rice

Nitric oxide reduces the stress effects of aluminum on the process of germination and early root growth of rice

Seed longevity: Survival and maintenance of high germination ability of dry seeds

Seeds’ physicochemical traits and mucilage protection against aluminum effect during germination and root elongation as important factors in a biofuel seed crop (Ricinus communis)

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