Promoting Effects of a Single <i>Rhodopseudomonas palustris</i> Inoculant on Plant Growth by <i>Brassica rapa chinensis</i> under Low Fertilizer Input

Abstract

Several Rhodopseudomonas palustris strains have been isolated from rice paddy fields in Taiwan by combining the Winogradsky column method and molecular marker detection. These isolates were initially screened by employing seed germination and seedling vigor assays to evaluate their potential as inoculants. To fulfill the demand in the present farming system for reducing the application of chemical fertilizers, we assessed the plant growth-promoting effects of the R. palustris YSC3, YSC4, and PS3 inoculants on Brassica rapa chinensis (Chinese cabbage) cultivated under a half quantity of fertilizer. The results obtained showed that supplementation with approximately 4.0×106 CFU g−1 soil of the PS3 inoculant at half the amount of fertilizer consistently produced the same plant growth potential as 100% fertility, and also increased the nitrogen use efficiency of the applied fertilizer nutrients. Furthermore, we noted that the plant growth-promotion rate elicited by PS3 was markedly higher with old seeds than with new seeds, suggesting it has the potential to boost the development of seedlings that were germinated from carry-over seeds of poor quality. These beneficial traits suggest that the PS3 isolate may serve as a potential PGPR inoculant for integrated nutrient management in agriculture.

Arsenic-Redox Transformation and Plant Growth Promotion by Purple Nonsulfur Bacteria Rhodopseudomonas palustris CS2 and Rhodopseudomonas faecalis SS5

“…Nookongbut et al [14] reported As-resistance and detoxification by different strains of R. palustris . Wong et al [34] reported IAA production as well as plant growth enhancement by R. palustris . However, literature reporting both As-detoxification and plant growth promotion by same PNSB strains is scarce.…”

Fish polyculture system integrated with vegetable farming improves yield and economic benefits of small-scale farmers

“…Furthermore, B . rapa chinensis responds well to moist fertile soil and can be produced annually in the tropics under full sun conditions and it is one of the most productive leaf vegetables grown with an average edible leaf yield of 3577 g m −2 (Idris, Ali, Gayah, Hassan & Abidin ; Kalisz ; Wong, Tseng, Hsu, Lur, Mo, Huang, Hsu, Lee & Liu ). On the other hand, C .…”

“…This integration has the potential to improve production and economics for small-scale farmers because B. rapa chinensis is a common crop on rural farms in Tanzania (Baitilwake, De Bolle, Salomez, Mrema & De Neve 2012) and a preferred vegetable by producers and consumers because it is easy to cultivate, with a short growing period (Kalisz, Kostrzewa, Se z kara, Grabowska & Cebula 2012), has a unique flavour, health benefits (Pant, Radovich, Hue & Miyasaka 2012), an attractive appearance (Thosaikham, Jitmanee, Sittipout, Maneetong, Chantiratikul & Chantiratikul 2014) and high market demand worldwide (Cartea, Francisco, Soengas & Velasco 2010). Furthermore, B. rapa chinensis responds well to moist fertile soil and can be produced annually in the tropics under full sun conditions and it is one of the most productive leaf vegetables grown with an average edible leaf yield of 3577 g m À2 (Idris, Ali, Gayah, Hassan & Abidin 2011;Kalisz 2011;Wong, Tseng, Hsu, Lur, Mo, Huang, Hsu, Lee & Liu 2014). On the other hand, C. gariepinus and O. niloticus which are commonly cultured fish species have higher market demand, produce high yields, require low input resources to culture (El-Naggar 2007) and are preferred as source of protein all over the world (Shoko, Limbu, Mrosso, Mkenda & Mgaya 2016).…”

Characterization of Rhodopseudomonas palustris population dynamics on tobacco phyllosphere and induction of plant resistance to Tobacco mosaic virus

“…R. palustris is now widely used to treat agricultural and industrial wastes or to produce bioenergy (Idi et al, 2015). Its potentials in organic farming are new topics of many research laboratories (Fawzy et al, 2012;Wu et al, 2013;Wong et al, 2014). In our previous report, we have shown that R. palustris GJ-22 strain can induce a systemic resistance (referred to induced systemic resistance [ISR] thereafter) to Tobacco mosaic virus (TMV) infection in tobacco and promote plant growth through production of two phytohormones (i.e.…”