接种磷酸盐溶解菌群可提高低磷条件下岩石磷农艺效率和小麦产量

IF 3.9 3区 生物学 Q1 PLANT SCIENCES
Wissal Elhaissoufi, Said Khourchi, Rym Saidi, Ammar Ibnyasser, Meryem Haddine, Rachid Ghani, Youssef Zeroual, Zineb Rchiad, Cherki Ghoulam, Adnane Bargaz
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引用次数: 0

摘要

众所周知,磷酸盐溶解菌(PSB)能提高磷的可用性和作物产量。然而,迄今为止,人们对作物在不同条件下和整个生长阶段对接种反应的深刻理解还不全面。在使用细菌联合体时就是这种情况,其中涉及错综复杂的物种相互作用,很可能会确保互补功能,以改善植物生长和养分获取。因此,本研究旨在评估在受控和田间条件下,硬粒小麦(处于不同生长阶段)对三种 PSB 复合菌群(BCa、BCb 和 BCc)和岩石磷(RP)的联合施用与三种未接种对照处理(未施肥 "P0"、施肥 RP 和正磷酸盐 "OrthoP")的农业生理学反应。总体而言,在对照和田间条件下,接种 BC 能显著提高谷物产量、养分吸收率和生理性能,其水平与施用正磷酸盐相当。特别是,在田间条件下,BCc 能显著提高生物量和穗数,使谷物产量比未接种 RP 的处理高出 2 倍。与未接种 RP 肥的植株相比,在这两种条件下,穗的生物量(40.6% 和 102.1%)和根的生物量(37.3% 和 156.5%)都有所提高。穗的养分含量(磷 "81%"、氮 "72%"、钾 "71%")和谷物产量(平均 68.3%)也因 BC(主要是 BCc)而显著增加,这可归因于 BC 通过诱导酸性磷酸酶活性和根系生长特性而提高根瘤可用磷的能力。然而,与未接种 RP 肥的植物相比,在不同生长阶段(30 天、75 天和 95 天),根瘤可用钾明显减少(51.5%、47.6% 和 25.3%),而土壤微生物生物量钾却有所增加(60.3%、107.8% 和 86.7%)。土壤微生物生物量 P 和小麦农业生理表现的提高可直接归因于 BC 在植物生长的不同阶段产生的积极影响,这表明 BC 对在低 P 条件下维持小麦生产做出了重要的生态贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Inoculation with Phosphate Solubilizing Bacterial Consortia Enhanced Rock P Agronomic Efficiency and Yield of Wheat Under Low P Conditions

Inoculation with Phosphate Solubilizing Bacterial Consortia Enhanced Rock P Agronomic Efficiency and Yield of Wheat Under Low P Conditions

Phosphate-solubilizing bacteria (PSB) are well known to enhance P availability and crop yield. However, profound understanding of crop responses to inoculation under contrasting conditions and throughout crop growth stages are so far incomplete. That is the case when employing bacterial consortia, which involve intricate species interactions likely ensuring complementary functions for a better plant growth and nutrient acquisition. This study, therefore, aimed to evaluate agro-physiological responses of durum wheat (under different growth stages) to the combined application of three PSB consortia (BCa, BCb, and BCc) and rock P (RP) versus three uninoculated control treatments (unfertilized “P0”, fertilized with RP and orthophosphate “OrthoP”) under controlled and field conditions. Overall, BC inoculation significantly enhanced grain yield, nutrient uptake, and physiological performance under both controlled and field conditions, and at a comparable level to OrthoP application. Particularly, BCc significantly enhanced biomass and number of spikes under field conditions yielding 2-times higher grain yield than uninoculated RP treatment. This improvement can be attributed to enhanced biomass of shoots (40.6 and 102.1%) and roots (37.3 and 156.5%) under both conditions compared to uninoculated RP-fertilized plants. Spikes nutrient content also increased significantly (P “81%”, N “72%”, and K “71%”) along with grain yield (average of 68.3%) in response to BC (mainly BCc), which can be attributed to the capacity of BC to enhance rhizosphere available P through induced acid phosphatases activity and growth traits of roots. However, across plant growth stages (30-, 75-, and 95-day old) there was a noticed decrease in rhizosphere available P (51.5, 47.6 and 25.3%) concomitantly to increased soil microbial biomass P (60.3, 107.8, and 86.7%) compared to uninoculated RP-fertilized plants. The increase of both soil microbial biomass P and wheat agro-physiological performance can be directly attributed to positive impacts of BC across different stages of plant growth, demonstration a significant ecological contribution to sustain wheat production under low P conditions.

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来源期刊
CiteScore
8.40
自引率
6.20%
发文量
312
审稿时长
1.8 months
期刊介绍: The Journal of Plant Growth Regulation is an international publication featuring original articles on all aspects of plant growth and development. We welcome manuscripts reporting question-based research on various aspects of plant growth and development using hormonal, physiological, environmental, genetic, biophysical, developmental and/or molecular approaches. The journal also publishes timely reviews on highly relevant areas and/or studies in plant growth and development, including interdisciplinary work with an emphasis on plant growth, plant hormones and plant pathology or abiotic stress. In addition, the journal features occasional thematic issues with special guest editors, as well as brief communications describing novel techniques and meeting reports. The journal is unlikely to accept manuscripts that are purely descriptive in nature or reports work with simple tissue culture without attempting to investigate the underlying mechanisms of plant growth regulation, those that focus exclusively on microbial communities, or deal with the (elicitation by plant hormones of) synthesis of secondary metabolites.
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