Study of photosynthetic pigments changes of maize (Zea mays L.) under nano Tio2 spraying at various growth stages

Abstract

Tests were done on the effects of treatments of titanium dioxide spray on corn (Zea mays L.). The study was conducted as a factorial experiment in a randomized complete block design with four replications. Treatments consisted of two factors; the first factor was stage of plant growth that spraying was applied (vegetative stage, appearance of male flowers and female flowers); and the second factor was that of different concentrations of titanium dioxide nanoparticles (Tio2) that consisted of spray with water (control), titanium dioxide or bulk, nano titanium dioxide at concentrations of 0.01% and 0.03%. Results showed that effect of nano Tio2 was significant on chlorophyll content (a and b), total chlorophyll (a + b), chlorophyll a/b, carotenoids and anthocyanins. The maximum amount of pigment was recorded from the treatment of nano Tio2 spray at the reproductive stage (appearance of male and female flowers) in comparison with control. Thus, an application of nanoparticles (nanao Tio2) can facilitate an increase in crop yield, especially corn yield.

Impact of foliar application of nano micronutrient fertilizers and titanium dioxide nanoparticles on the growth and yield components of barley under supplemental irrigation

“…It has been documented that plants under optimum condition tend to increase growth period as much as possible which can result in improved leaf photosynthesis, light-use potential and higher yield (Cui et al, 2015). This study showed that nano-fertilizers and nano TiO 2 considerably influenced the straw (SY) and grain yield (GY), which corroborate the findings of a great deal of the previous work (Gao et al, 2013;Morteza et al, 2013;Klingenfuss, 2014;Tarafdar et al, 2014). Foliar utilization of micronutrients improved straw yield and grain yield up to 7 % and 16 % over to control, respectively.…”

“…Besides the same research reported a positive effect of nano-titanium on chlorophyll content in wheat seedling. These findings further support the idea of Morteza et al, (2013) that foliar utilization of nTiO 2 can improve plant growth and grain yield by facilitating the manufacture of pigments and transformation of light energy to active electron and chemical activity and increases photosynthetic efficiency. .32 SL=spike length (cm), TGW=1000 grain mass (g), DA= days to anthesis, DM= days to maturity, CHL= chlorophyll content (SPAD unit), GY= grain yield (Kg ha -1 ), SY= straw yield (Kg ha -1 ), HI= harvest index (%).…”

“…In plant nanoparticles may adsorb to plant surface and taken up through natural nano or micrometer scale openings. The results of other previous studies demonstrated nTiO 2 as an efficient photocatalyst by improving the photosynthetic complexes, and nitrogen metabolism can enhance cell growth as well as fresh and dry mass of plant (Morteza et al, 2013;Gao et al, 2013;Klingenfuss, 2014;Rezaei et al, 2015;Raliya et al, 2015). However evidence from this study suggested that nTiO 2 along with nano-fertilizers can effectively influence both vegetative and reproductive characteristics under supplemental irrigation in semi-arid region.…”

“…Also several studies show that exogenous application of some nanoparticle can significantly improve plant growth (Mandeh et al, 2012;Song et al, 2013). Titanium dioxide nanoparticles (nTiO 2 ) are promising as efficient nutrient source for plants to improve biomass production due to enhanced the nitrogen assimilation, photoreduction activities of photosystem II and electron transport chain, scavenging of reactive oxygen species, and (Morteza et al, 2013;Raliya et al, 2015). In the northwestern part of Iran zinc and iron deficiencies are nutritional disorders in most of the plants grown in dryland condition.…”

The effects of silicon and titanium on safflower (Carthamus tinctorius L.) growth under moisture deficit condition

“…nTiO 2 increases plant growth by enhancing nitrogen metabolism (Yang et al, 2006) which improves the absorption of nitrate in spinach, and also by accelerating the conversion of inorganic nitrogen into organic nitrogen which increases the fresh and dry masses. Morteza et al (2013) suggested that foliar utilization of nTiO 2 can improve plant growth and grain yield by improving the biosynthesis of pigments and conversionof light energy to chemical energy, thereby increasing photosynthetic efficiency. Effects of nTiO 2 on the content of light harvesting complex II (LHC II) on thylakoid membranes of spinach increases LHC II content Lei et al, 2007).…”