Plant-Associated Bacteria as Sources for the Development of Bioherbicides

Abstract

Weeds cause significant yield losses in crop production and influence the health of animals and humans, with some exotic weeds even leading to ecological crises. Weed control mainly relies on the application of chemical herbicides, but their adverse influences on the environment and food safety are a significant concern. Much effort has been put into using microbes as bioherbicides for weed control. As plant-associated bacteria (PAB), they are widely present in the rhizophere, inside crops or weeds, or as pathogens of weeds. Many species of PAB inhibit the seed germination and growth of weeds through the production of phytotoxic metabolites, auxins, hydrogen cyanide, etc. The performance of PAB herbicides is influenced by environmental factors, formulation type, surfactants, additives, application methods, and cropping measures, etc. These factors might explain the inconsistencies between field performance and in vitro screening results, but this remains to be clarified. Successful bioherbicides must be specific to the target weeds or the coinciding weeds. Detailed studies, regarding factors such as the formulation, application techniques, and combination with cultivation measures, should be carried out to maximize the performance of PAB-based bioherbicides.

Research progress of triazole derivatives in the discovery of agricultural chemicals

“…Weeds compete with crops for sunlight, water, space, and nutrients, which seriously affects the normal growth of crops, resulting in loss of crop yield and quality [121,122]. The use of chemical herbicides is one of the simplest and most effective ways of weed management [123], and the discovery of new herbicides is an urgent need for weed management.…”

Respon Pertumbuhan Dan Hasil Kentang Var. Cingkariang Dan Populasi Gulma Terhadap Isolat Rizobakteri Indigen

“…Akan tetapi penelitian menunjukkan bahwa rizobakteri dapat mempengaruhi pertumbuhan gulma melalui berbagai proses fisiologis seperti regulasi hormon dan osmolitas pada keadaan cekaman kekeringan (Barnawal et al 2019). Penghambatan perkecambahan dan pertumbuhan gulma oleh bakteri yang berasosisasi dengan akar tanaman juga dapat terjadi melalui produksi fitotoksin atau hydrogen sianida (Fang et al 2022) oleh rizobakteria.…”

“…Gulma Amaranthus spinosus yang sebelum olah tanah tidak ditemukan kemudian berkecambah dan tumbuh sehingga teridentifikasi pada 8 MST (Qolby et al 2020). Potensi rizobakteria dan formulasinya sebagai bioherbisida masih perlu terus dikembangkan (Fang et al 2022) agar dapat mendukung upaya praksis pertanian berkelanjutan yang ramah lingkungan (Chandran et al 2021) Pertumbuhan tanaman kentang seperti tinggi tanaman dan jumlah cabang per tanaman menunjukkan respon berbeda pada isolat rizobakteri indigen yang berbeda (Tabel 2). Isolat Ag3 L3 S5.1 secara konsisten memberikan respon terbaik pada semua peubah pengamatan kecuali jumlah umbi per tanaman yang merespon sama pada semua perlakuan.…”

“…Jenis PGPR yang berbeda dapat bekerja melalui berbagai peran seperti biostimulant, bioprotectant, atau biofertilizer (Banach et al 2019). Potensi PGPR sebagai bioherbisida juga telah diuji untuk dapat meningkatkan pertumbuhan dan hasil tanaman pangan (Ahluwalia et al, 2021;Berestetskiy, 2023;Fang et al 2022;Yu et al 2023).…”

Using to Pseudomonas aeruginosa Control some Kinds of Weeds and its Effect on Soil Microbes

“…Successful bio-herbicides need to be specific to the target weeds or related weeds in order to be successful. In-depth studies on factors like formulation, application tactics, and coordination with cultivation techniques should be done to maximize the effectiveness of PAB-based bio-herbicides, Fang et al, (2022).…”