@article { ISI:000377826000008, title = {Biogenic green synthesis of monodispersed gum kondagogu (Cochlospermum gossypium) iron nanocomposite material and its application in germination and growth of mung bean (Vigna radiata) as a plant model}, journal = {IET Nanobiotechnology}, volume = {10}, number = {3}, year = {2016}, month = {JUN}, pages = {141-146}, publisher = {INST ENGINEERING TECHNOLOGY-IET}, address = {MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND}, abstract = {

An eco-friendly green and one-pot synthesis of highly monodispersed iron (Fe) nanoparticles (NPs) by using a natural biopolymer, gum kondagogu (GK) as reducing and capping agent is proposed. The NPs synthesised were characterised by ultra-violet-visible spectroscopy, transmission electron microscopy, scanning electron microscopy and X-ray diffraction. As the concentration of gum and time increases, the intensity of NPs formation increased. The NPs were highly monodispersed with uniform circular shapes of 2-6 nm in size. The formed NPs were crystalline in nature which was confirmed by diffraction analysis. The conversion ratio of Fe ionic form to NPs was 21\% which was quantified by inductively coupled plasma mass spectroscopy (ICP-MS). Fe is essential for plant growth and development. A study was conducted to examine the effect of these NPs on the growth of mung bean (Vigna radiata). The radical length and biomass was increased in seeds exposed to Fe NPs than the ions. The uptake of Fe NPs by the sprouts was also quantified by ICP-MS, in which Fe was more in mung bean seeds exposed to NPs. The -amylase activity was increased in the seeds exposed to NPs. The observed increase in the biomass by Fe NPs and seed germination may facilitate its application in the agriculture as an important cost-effective method for plant growth.

}, keywords = {alpha-amylase activity, Biogenic green synthesis, biological techniques, Biomass, Cochlospermum gossypium, diffraction analysis, enzymes, Fe, gum concentration, high-monodispersed iron nanoparticles, inductively coupled plasma mass spectroscopy, ionic-to-nanoparticle iron conversion ratio, iron, monodispersed gum kondagogu, monodispersed gum kondagogu iron nanocomposite material, mung bean germination, mung bean growth, Nanobiotechnology, Nanocomposites, nanoparticle formation, Nanoparticles, natural biopolymer, plant growth, plant model, scanning electron microscopy, size 2 nm to 6 nm, transmission electron microscopy, ultraviolet spectra, ultraviolet-visible spectroscopy, Vigna radiata, visible spectra, X-ray diffraction}, issn = {1751-8741}, doi = {10.1049/iet-nbt.2015.0112}, author = {Raju, Dugyala and Mehta, Urmil J. and Beedu, Sashidhar Rao} } @article {46989, title = {Enzymatic and non-enzymatic detoxification of reactive carbonyl compounds improves the oxidative stress tolerance in cucumber, tobacco and rice seedlings}, journal = {Journal of Plant Growth Regulation}, volume = {39}, year = {2020}, month = {SEP}, pages = {1359-1372}, type = {Article}, abstract = {

Detoxification of reactive carbonyl compounds (RCC) is crucial to sustain cellular activity to improve plant growth and development. Seedling growth is highly affected by accumulation of RCC under stress. We report non-enzymatic, enzymatic mechanisms of detoxification of RCC in the cucumber, tobacco and rice seedling systems exposed to glucose, NaCl, methyl viologen (MV) induced oxidative stress. The cucumber seedlings exposed to carbonyl stress had higher levels of malondialdehyde (MDA), protein carbonyls (PCs) and advanced glycation end-product N-carboxymethyl-lysine (AGE-CML) that negatively affected the seedling growth. The overexpression of enzyme encoding aldo-keto reductase-1 (AKR1) in tobacco and rice showed detoxification of RCC, MDA and methylglyoxal (MG) with improved seedling growth under glucose, NaCl and MV-induced oxidative stress. Further, small molecules like acetylsalicylic acid (ASA), aminoguanidine (AG), carnosine (Car), curcumin (Cur) and pyridoxamine (PM) showed detoxification of RCC non-enzymatically and rescued the cucumber seedling growth from glucose, NaCl and MV-stress. In autotrophically grown rice seedlings these molecules substantially improved seedling growth under MV-induced oxidative stress. Seedlings treated with the small molecules sustained higher guaiacol peroxidase (GPX) enzyme activity signifying the role of small molecules in reducing carbonyl stress-induced protein inactivation and AGE-CML protein modifications. The results showed that besides enzymatic detoxification of RCC, the small molecules also could reduce cytotoxic effect of RCC under stress. The study demonstrates that small molecules are attractive compounds to improve the seedling growth under stress conditions.

}, keywords = {Oxidative stress, plant growth, Reactive carbonyl scavengers, Seed germination, small molecules}, issn = {0721-7595}, doi = {10.1007/s00344-020-10072-w, Early Access Date = JAN 2020}, author = {Nareshkumar, Ambekar and Subbarao, Sindhu and Vennapusa, Amarnatha Reddy and Ashwin, Vargheese and Banarjee, Reema and Kulkarni, Mahesh J. and Ramu, Vemanna S. and Udayakumar, Makarla} } @article {48170, title = {Screening of osmotic stress-tolerant bacteria for plant growth promotion in wheat (Triticum aestivum L.) and brinjal (Solanum melongena L.) under drought conditions}, journal = {Letters in Applied Microbiology}, volume = {75}, year = {2022}, month = {NOV}, pages = {1286-1292}, type = {Article}, abstract = {

Drought stress adversely affects plant growth and productivity. Therefore, the application of plant growth-promoting bacteria is a viable option for combating drought resistance in crops. In this study, 144 bacteria were isolated from the Kutch desert soil in Gujarat. Based on osmotic stress tolerance and PGP properties, two strains, Bacillus tequilensis (KS5B) and Pseudomonas stutzeri (KS5C) were tested for their effect on wheat (Triticum aestivum L.) and brinjal (Solanum melongena L.) under drought stress conditions. Inoculation with osmotic stress-tolerant bacteria showed 15 center dot 15-29 center dot 27\% enhancement in root length of wheat and 15 center dot 27-32 center dot 59\% in brinjal plants. Similarly, the enhancement of shoot length ranged from 14 center dot 72 to 37 center dot 70\% for wheat and 59 center dot 39-95 center dot 94\% for brinjal plants. Furthermore, the inoculated plants showed significant improvement in chlorophyll content and antioxidant properties such as proline, peroxidase and polyphenol oxidase activity compared to the control. Therefore, the bacterial strains identified in this study can be used to mitigate drought stress and enhance plant biomass.

}, keywords = {Antioxidant, brinjal, drought, plant growth, Wheat}, issn = {0266-8254}, doi = {10.1111/lam.13797}, author = {Patel, P. and Patil, T. and Maiti, S. and Paul, D. and Amaresan, N.} }