欧亚国际

较近，来自丹麦歌本哈根大学的科学家利用Videometer多光谱成像系统，发表了题为Bacillus licheniformis FMCH001 Increases Water Use Efficiency via Growth Stimulation in Both Normal and Drought Conditions的文章，地农芽孢杆菌（Bacillus licheniformis）FMCH001在正常和干旱条件通过生长刺激，可提升水利用效率。

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Bacillus licheniformis FMCH001 Increases Water Use Efficiency via Growth Stimulation in Both Normal and Drought Conditions

Saqib Saleem Akhtar1, Daniel Buchvaldt Amby1, Josefine Nymark Hegelund1*, Lorenzo Fimognari2, Dominik K. Großkinsky1†, Jesper Cairo Westergaard1, Renate Müller1, Lars Moelbak2, Fulai Liu1 and Thomas Roitsch1,3

1Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark

2Plant Health Innovation, Chr-Hansen A/S, Hørsholm, Denmark

3Department of Adaptive Biotechnologies, Global Change Research Institute, Czech Academy of Sciences, Brno, Czechia

Increasing agricultural losses due to biotic and abiotic stresses caused by climate change challenge food security worldwide. A promising strategy to sustain crop productivity under conditions of limited water availability is the use of plant growth promoting rhizobacteria (PGPR). Here, the effects of spore forming Bacillus licheniformis (FMCH001) on growth and physiology of maize (Zea mays L. cv. Ronaldinho) under well-watered and drought stressed conditions were investigated. Pot experiments were conducted in the automated high-throughput phenotyping platform PhenoLab and under greenhouse conditions. Results of the PhenoLab experiments showed that plants inoculated with B. licheniformis FMCH001 exhibited increased root dry weight (DW) and plant water use efficiency (WUE) compared to uninoculated plants. In greenhouse experiments, root and shoot DW significantly increased by more than 15% in inoculated plants compared to uninoculated control plants. Also, the WUE increased in FMCH001 plants up to 46% in both well-watered and drought stressed plants. Root and shoot activities of 11 carbohydrate and eight antioxidative enzymes were characterized in response to FMCH001 treatments. This showed a higher antioxidant activity of catalase (CAT) in roots of FMCH001 treated plants compared to uninoculated plants. The higher CAT activity was observed irrespective of the water regime. These findings show that seed coating with Gram positive spore forming B. licheniformis could be used as biosestimulants for enhancing plant WUE under both normal and drought stress conditions.