Improving key enzyme activities and quality of rice under various methods of zinc application

Abstract

Zinc (Zn) is an important micronutrient for the physiology of plants. It is poorly available to the plants in soil solution. A pot experiment was conducted to evaluate effectiveness of various Zn application methods on key enzyme activities and protein content of two contrasting rice genotypes viz., PD16 (Zn efficient) and NDR359 (Zn inefficient). The treatments were, control (0 mg Zn kg Among all the methods tested soil+foliar application of Zn fertilizers was found most effective in increasing superoxide dismutase (SOD) and carbonic anhydrase (CA) activities as well as chlorophyll and protein content in both the rice varieties. NDR359, showed higher enzyme activities and more chlorophyll content in leaves than PD16, when Zn was applied either through foliar spray alone or in soil along with foliar application. Regarding the protein content in grains, PD16 showed higher protein content than NDR359, thus showed better translocation of Zn from leaves to grains.

Evaluation on Zinc and Selenium Nutrients in Polished Rice of Rice Genotypes Under Zinc Biofortification

“…It was reported that a Zn efficient rice variety contains higher chlorophyll content than a Zn inefficient rice variety under Zn application [26]. According to the current results, two Se rich rice genotypes, Z3055B and Z5097B contained the higher total chlorophyll content.…”

“…It has been reported that Zn promotes chlorophyll synthesis as a structural and catalytic component of proteins, enzymes, and as co-factor for normal development of pigment biosynthesis [25]. In previous reports, 5 mg/kg of soil Zn application increased total chlorophyll content in rice leaves and 14 Zn mg/kg of soil could increase SPAD values improving plant photosynthetic characteristics under water stress in wheat [26,27].…”

Effect of Foliar Zno and Feo Nanoparticles Application on Growth and Nutritional Quality of Red Radish and Assessment of Their Accumulation on Human Health

“…Both microelements also are necessary in activation of many enzymes that existent in photosynthetic tissues and necessary for chlorophyll formation (Ramani & Kannan 1985). It was reported that zinc play a vital role in activation of enzymes related to protein biosynthesis and metabolism of carbohydrates (Mathpal et al 2015). In the current study, our results showed foliar application of ZnO and FeO GNPs plus chicken manure caused a significant improvement in growth parameters (Table 3), as Chaudhuri & Malodia (2017) reported.…”

Crosstalk of Zn in Combination with Other Fertilizers Underpins Interactive Effects and Induces Resistance in Tomato Plant against Early Blight Disease

“…K also has its importance in parallel to other macronutrients that contribute in various biochemical and physiological functions ( Hasanuzzaman et al, 2018 ; Liljeroth et al, 2016 ) Like macronutrients, the micronutrients have also been reported to enhance the plant disease resistance by reducing disease severity. In plant metabolism, a key role is played by zinc (Zn) contributes in various reaction as enzyme co-factor like energy transfer, redox reactions, and stabilization of ribosomal fractions for protein synthesis ( Mathpal et al, 2015 ; Noulas et al, 2018 ). Numerous researches suggested that the proper application of Zn enhances the growth and productivity in a diverse range of crops including beans, chickpea, maize, rice, cotton and wheat ( Khan et al, 2018 ; Khattak et al, 2016 ; Rehman et al, 2018 ).…”