Concurrent effect of aluminum toxicity and phosphorus deficiency in the root growth of aluminum tolerant and sensitive rice cultivars

Pradhan, Amit Kumar; Shandilya, Zina Moni; Sarma, Parismita; Bora, Ranjan Kumar; Regon, Preetom; Vemireddy, Lakshmi Narayana R.; Tanti, Bhaben

doi:10.1007/s11738-022-03509-0

Cited by 8 publications

(1 citation statement)

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“…In our study, the time-course experiment showed that the expression of LpNRAT1 was rapidly induced (3 h) in response to Al stress, whereas LpALS1 expression exhibited upregulation after 24 h of Al exposure (Figure 5A,B), thus providing the first evidence that these transporters are also involved in Al uptake and Al sequestration in ryegrass. Consistent with our results, higher NRAT1 and ALS1 expression has been shown to be responsible for Al tolerance in rice [41,43,44] and Hydrangea macrophylla [22], suggesting that both Al transporters may be involved in internal Al detoxification in ryegrass. Interestingly, the transcript levels of both LpNRAT1 and LpALS1 were enhanced by P limitation (Figure 5A,B).…”

Section: Discussionsupporting

confidence: 91%

Dissecting the Roles of Phosphorus Use Efficiency, Organic Acid Anions, and Aluminum-Responsive Genes under Aluminum Toxicity and Phosphorus Deficiency in Ryegrass Plants

Parra-Almuna,

Pontigo,

Ruiz

et al. 2024

Plants

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Aluminum (Al) toxicity and phosphorus (P) deficiency are widely recognized as major constraints to agricultural productivity in acidic soils. Under this scenario, the development of ryegrass plants with enhanced P use efficiency and Al resistance is a promising approach by which to maintain pasture production. In this study, we assessed the contribution of growth traits, P efficiency, organic acid anion (OA) exudation, and the expression of Al-responsive genes in improving tolerance to concurrent low-P and Al stress in ryegrass (Lolium perenne L.). Ryegrass plants were hydroponically grown under optimal (0.1 mM) or low-P (0.01 mM) conditions for 21 days, and further supplied with Al (0 and 0.2 mM) for 3 h, 24 h and 7 days. Accordingly, higher Al accumulation in the roots and lower Al translocation to the shoots were found in ryegrass exposed to both stresses. Aluminum toxicity and P limitation did not change the OA exudation pattern exhibited by roots. However, an improvement in the root growth traits and P accumulation was found, suggesting an enhancement in Al tolerance and P efficiency under combined Al and low-P stress. Al-responsive genes were highly upregulated by Al stress and P limitation, and also closely related to P utilization efficiency. Overall, our results provide evidence of the specific strategies used by ryegrass to co-adapt to multiple stresses in acid soils.

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