Alleviation of Al Toxicity in Barley by Addition of Calcium

Guo, Tao; Chen, Ying; Zhang, Yanhua; Jin, Yefei

doi:10.1016/s1671-2927(06)60131-4

Cited by 20 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SOD, POD, and CAT are the key antioxidant enzymes in the enzymatic detoxi cation system. In this study, we measured the activities of various antioxidant enzymes and found that Al toxicity signi cantly reduced SOD activity while marked enhanced the POD and CAT activities, which is similar to the results of previous studies (Guo et al, 2006;Huang et al, 2009). The SOD is the rst line of defense program for various enzymatic systems to scavenge ROS (Sanchez-Casas and Klessig, 1994).…”

Section: Effects Of Boron On Antioxidant Enzyme System Under Al Stresssupporting

confidence: 89%

“…Pirzadah et al (2019) discovered that the antioxidant system is essential to protect plants from the initial deleterious effects of Al. Similarly, it has been proven that exogenous P, uorine, and Ca mitigate Al toxicity in plants by enhancing the overall antioxidant capacity (Guo et al, 2006;Dawood, et al, 2022;Karimaei et al, 2022). Therefore, it is feasible to take certain measures to alleviate Al toxicity by regulating the activity of antioxidant enzymes in plants.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Boron alleviates the aluminum toxicity in buckwheat by regulating antioxidant defense system and maintaining osmotic balance

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

Aluminum (Al) pollution in acidic soils has become a serious environmental problem worldwide. Boron can help plants mitigate aluminum phytotoxicity in acidic soils, but its underlying mechanism in buckwheat remains completely unknown. In this study, the buckwheat germination and greenhouse pot experiments were carried out under the conditions of four Al concentrations (0, 5, 10, and 15 mM) and four boron concentrations (0, 10, 30, and 50 µM). This research aimed to investigate the mitigation effect of exogenous boron on the Al toxicity of buckwheat and reveal the mechanism from the aspects of growth characteristics, antioxidant enzyme system, and osmotic regulation. The results showed that boron supply reduced the accumulation of Al in buckwheat roots, increased the antioxidant enzyme activity and the content of osmotic adjustment substances in roots and leaves, reduced the Al damage to root and leaf cells, maintained the osmotic balance of the cells, improved the root activity and the content of leaf photosynthetic pigment, ultimately leading to a significant increase in buckwheat biomass. In conclusion, different levels of boron treatment increased the tolerance of buckwheat root and leave to Al toxicity, and had a promoting effect on the growth of buckwheat. Therefore, applying boron is a promising green remediation technique to improve crop tolerance in Al-contaminated acidic soil.

show abstract

Section: Effects Of Boron On Antioxidant Enzyme System Under Al Stresssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Boron alleviates the aluminum toxicity in buckwheat by regulating antioxidant defense system and maintaining osmotic balance

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…B supplementation might reinforce the bonding of Ca 2+ to cell wall pectin polysaccharides as Ca 2+ did for B-RGII (Kobayashi et al 1999;Wimmer and Goldbach 1999), thus reducing the exchange of Ca 2+ from crucial binding sites by Al 3+ , as reported in root border cells . The amelioration effect of Al toxicity by Ca 2+ cation was caused by the more Ca maintained in cell wall pectin while less Al accumulated in cell wall as well (Ryan et al 1997;Kong et al 2000;Guo et al 2006). The positive effects of B in decreasing Al in root tips/cell wall and in improving root growth under Al toxicity were more pronounced after the longer B pretreatment.…”

Section: Discussionmentioning

confidence: 94%

Boron alleviates aluminum toxicity in pea (Pisum sativum)

Shen

Xiao

et al. 2008

Plant Soil

View full text Add to dashboard Cite

One important target of boron (B) deficiency and aluminum (Al) toxicity is cell wall. Thus we studied the hypothesis that B is capable of alleviating Al toxicity in pea (Pisum sativum). Short-term and prolonged Al exposure to pea roots at different B levels was carried out on uniform seedlings precultured at a low B level. When seedlings with a low B level were supplied with or without B for 1 and 2 days before 24 h Al exposure, roots were longer while root diameter was thinner after B addition especially for 2 days even with exposure to Al; root elongation was inhibited while root diameter was enlarged by Al exposure. Callose induction by Al toxicity was higher with B added, but this was reversed after the removal of the cotyledons. Hematoxylin staining was lighter in the root tips given B, and Al content in the root tips and cell walls dropped after exposure to B. This indicates that B alleviated Al toxicity in the root tips during short-term Al exposure by decreasing Al binding in root cell walls. An increase in chlorophyll and biomass and reduced chlorosis were found at the higher level of B during prolonged Al treatment, which was coincided with the decreased Al contents, indicating that B alleviated Al toxicity to shoots. B supplementation alleviates some of the consequences of Al toxicity by limiting some Al binding in cell walls, resulting in less injury to the roots as well as less injury to the shoots.

show abstract

“…The consequence of such metal competition can be the deficiency of essential elements in chloroplasts. Therefore, the addition of the deficient metal often alleviates the toxic effects of the metal in excess (e.g., Ca in the case of excess Al: Guo et al 2006;excess Cd: Wang and Song 2009;or excess Ni: Ouzounidou et al 2006; Fe in the case of excess Cd: Siedlecka and Krupa 1996;Solti et al 2008; Zn in the case of excess Cd: Zhao et al 2005;Aravind and Prasad 2004;Podar et al 2004). Interestingly, sometimes, a small amount of non-essential metal can be beneficial for the plant due to improvement of ion balance; for example, a low Cr level improves Fe/Mn ratio in Fedeficient bean chloroplasts (Poschenrieder et al 1991).…”

Section: Cross Talk Between Different Metalsmentioning

confidence: 99%

Soil metals, chloroplasts, and secure crop production: a review

Solymosi

Bertrand²

2011

Agron. Sustain. Dev.

View full text Add to dashboard Cite

with unbalanced metal concentrations are used worldwide for crop cultivation. Even though plants are able to develop strategies to cope with metal stress, either metal deficiency or excess, this unbalance affects the whole plant. Chloroplasts are key organelles for organic matter synthesis and biomass production. Under metal stress, chloroplasts suffer severe alterations of their ultrastructure, associated with profound molecular and metabolic damages. These alterations are accompanied by unbalanced metal distribution in plants, in particular in edible crop organs. Toxic metals get either accumulated or there is a deficiency of nutrients, resulting in a weak nutritional value. Nonetheless, there is more and more knowledge on the functioning and regulation of metal transporters in plants. Such knowledge will allow growing crops with well-balanced metal concentrations in edible parts even on metal unbalanced soils. This review shows that almost all vital functions of chloroplasts, such as photosynthesis, CO 2 fixation, nitrogen and sulfur assimilation, and protein and nucleic acid metabolism, require metals. Therefore, the uptake of essential metals is necessary for the proper functioning of chloroplasts and, in turn, for crop productivity. We describe nutrient uptake mechanisms of plants and processes that influence essential and non-essential metal concentrations in different plant organs. We present an overview of metal transporters in chloroplasts. Several questions still need to be elucidated about the uptake and the trafficking of essential and non-essential metals into and within chloroplasts. Similarly to transporters present in other cellular compartments, the carriers are often not metal-specific. Therefore, essential and non-essential metals may compete for carriers. As a result, unbalanced soil metal concentrations can be reflected in the plants and in the chloroplasts. Metal deficiency or excess causes reduced growth and decreased productivity of crops. It can lead to human malnutrition. Several complex physiological processes can be responsible for the reduced biomass observed in plants with unbalanced metal concentration. In this review, we have focused on the structural and functional alterations of chloroplasts under metal deficiency or excess. Interestingly, besides specific differences, our data indicate several similarities in the response of chloroplasts to metal deficiency or excess. Indeed, oxidative stress and several ultrastructural alterations, e.g., increase in the number and size of plastoglobuli, disorganized grana and disturbed thylakoids, and swelling of the intrathylakoidal space, are observed in both cases. This indicates that changes in chloroplast ion homeostasis rather than the specific effect of a metal are responsible for decreased plant productivity. Therefore, sustainable agriculture has to take into consideration solutions that enable undisturbed metal and ion homeostasis in chloroplasts of crop plants grown even in soils with unbalanced metal concentrations.Abstract An incr...

show abstract

Alleviation of Al Toxicity in Barley by Addition of Calcium

Cited by 20 publications

References 15 publications

Boron alleviates the aluminum toxicity in buckwheat by regulating antioxidant defense system and maintaining osmotic balance

Boron alleviates the aluminum toxicity in buckwheat by regulating antioxidant defense system and maintaining osmotic balance

Boron alleviates aluminum toxicity in pea (Pisum sativum)

Soil metals, chloroplasts, and secure crop production: a review

Contact Info

Product

Resources

About