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<p>Plants preferentially absorb phosphorus (P) as orthophosphate/ inorganic Phosphate (Pi), which has low solubility and is readily fixed in soil. This generates the P limitation condition in many soils, for which plants have evolved a number of responses collectively known as the Phosphate Starvation Response (PSR). Significant advancements have been achieved in identifying PSR, and a holistic viewpoint is presented in this review to summarize responses to Pi starvation and their regulation. Plant response to Pi starvation is mediated by a plethora of players, including MYB transcription factors, strigolactone, malate, and brassinosteroids. The involvement of Arbuscular Mycorrhizal Fungi (AMF) in the process adds another dimension for enhancing PSR. Strigolactone secretion from the root increases AMF colonization and nodulation for enhancing Pi uptake. Pi uptake can be achieved directly by the plant or indirectly by the Pi transporter and AMF. Root system architecture changes according to the Pi present in the environment. Increased auxin signalling is associated with Pi starvation, playing a part in lateral root development. Overall, several unanswered questions remain in the phosphate starvation response of plants, especially from the perspective of AMF symbiosis. Research focused on enhancing PSR with symbiotic association with AMF using advanced biotechnological approaches would pave way for increasing crop productivity.</p>

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Novel insights into phosphate starvation response in plants from mycorrhiza perspective

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年8月4日

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  • Radheshyam Yadav,
  • Rahul Beniwal,
  • Wusirika Ramakrishna

摘要

Plants preferentially absorb phosphorus (P) as orthophosphate/ inorganic Phosphate (Pi), which has low solubility and is readily fixed in soil. This generates the P limitation condition in many soils, for which plants have evolved a number of responses collectively known as the Phosphate Starvation Response (PSR). Significant advancements have been achieved in identifying PSR, and a holistic viewpoint is presented in this review to summarize responses to Pi starvation and their regulation. Plant response to Pi starvation is mediated by a plethora of players, including MYB transcription factors, strigolactone, malate, and brassinosteroids. The involvement of Arbuscular Mycorrhizal Fungi (AMF) in the process adds another dimension for enhancing PSR. Strigolactone secretion from the root increases AMF colonization and nodulation for enhancing Pi uptake. Pi uptake can be achieved directly by the plant or indirectly by the Pi transporter and AMF. Root system architecture changes according to the Pi present in the environment. Increased auxin signalling is associated with Pi starvation, playing a part in lateral root development. Overall, several unanswered questions remain in the phosphate starvation response of plants, especially from the perspective of AMF symbiosis. Research focused on enhancing PSR with symbiotic association with AMF using advanced biotechnological approaches would pave way for increasing crop productivity.