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<p>Seed priming with cyanobacteria mitigates the adverse impact of drought and improves growth of plants. Therefore, in the present investigation, seeds of drought&#xa0;sensitive wheat&#xa0;cultivar (HD-2967) were primed with cyanobacteria (<i>Nostoc</i> sp. SGR3 and <i>Neowestiellopsis</i> sp. SGR8). The germinated plants were subsequently&#xa0;exposed to drought stress by withholding irrigation during the tillering stages for 30&#xa0;days and the physiological parameters were recorded&#xa0;15 and 30 days after the imposition of the drought stress. As compared to un-primed irrigated control (UPI), the un-primed drought stressed plants (UPD) showed significant reduction in the growth rate and relative water content. However, primed plants (PDC1 and PDC2) recorded lower decrease in the growth rate and relative water content in response to drought stress. Further, PDC1 and PDC2 plants showed considerable improvement in the root system architecture, especially the total root length and total root surface area. Although, the foliar nitrogen and phosphorous content of UPD plants reduced significantly 15 and 30 days after the imposition of the drought stress, the reduction was less in PDC1 and PDC2 plants. Cyanobacterial priming increased the sugar and proline content of PDC1 and PDC2 plants. Therefore, the results of the present investigation suggest that cyanobacterial seed priming improved the root system architecture, water relations and nutrient uptake in wheat plants and protected from the inhibitory effects of post-germinative drought stress.</p>

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Cyanobacterial seed priming improved the growth, root system architecture and nutrient status in wheat (Triticum aestivum L.) leading to enhanced post-germinative drought stress tolerance

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • G. R. Sneha,
  • Venkadasamy Govindasamy,
  • Sarvendra Kumar,
  • Gerard Abraham

摘要

Seed priming with cyanobacteria mitigates the adverse impact of drought and improves growth of plants. Therefore, in the present investigation, seeds of drought sensitive wheat cultivar (HD-2967) were primed with cyanobacteria (Nostoc sp. SGR3 and Neowestiellopsis sp. SGR8). The germinated plants were subsequently exposed to drought stress by withholding irrigation during the tillering stages for 30 days and the physiological parameters were recorded 15 and 30 days after the imposition of the drought stress. As compared to un-primed irrigated control (UPI), the un-primed drought stressed plants (UPD) showed significant reduction in the growth rate and relative water content. However, primed plants (PDC1 and PDC2) recorded lower decrease in the growth rate and relative water content in response to drought stress. Further, PDC1 and PDC2 plants showed considerable improvement in the root system architecture, especially the total root length and total root surface area. Although, the foliar nitrogen and phosphorous content of UPD plants reduced significantly 15 and 30 days after the imposition of the drought stress, the reduction was less in PDC1 and PDC2 plants. Cyanobacterial priming increased the sugar and proline content of PDC1 and PDC2 plants. Therefore, the results of the present investigation suggest that cyanobacterial seed priming improved the root system architecture, water relations and nutrient uptake in wheat plants and protected from the inhibitory effects of post-germinative drought stress.