Effects of Foliar Application Pure Amino Acid and Amino Acid Containing Fertilizer on Broccoli (Brassica oleracea L. var. italica) Transplants

Abstract

The greenhouse experiments were carried out to study the effects foliar application of L-cysteine, L-methionine and Aminoacid fertilizer (AA) on Broccoli (Brassica oleracea var. italica) transplants. L-cysteine, L-methionine and AA was applied at three concentrations, 0, 100 and 200 mg L -1 commencing from 20 days after the sowing. Physical and chemical properties of the transplants determined according to the methods described by Tabatabaee. Results showed that L-cysteine at concentrations of 100 and 200 mg L -1 increased the leaf area by 53% and 48%, while methionine and the amino-acid-bearing fertilizer, both at 200 mg L -1 , increased the leaf area by 59% and 48% respectively. These percentages are expressed in comparison to the control. L-cysteine at concentrations of 100 and 200 mg L -1 increased the fresh weight of shoots by 50% and 55%, respectively, while methionine at 100 and 200 mg L -1 increased the fresh weight of shoots by 55% and 60% respectively. The amino-acid-bearing fertilizer treatments at a concentration of 200 mg L -1 increased the shoot dry weight of Broccoli seedlings by 38%, L-cysteine at concentrations of 100 and 200 mg L -1 increased the root dry weight by 26% and 60%, methionine at 100 and 200 mg L -1 increased the root dry weight by 31% and 177%. The results showed that methionine at 200 mg L -1 increased chlorophyll by 61%. The amino-acid-bearing fertilizer at a concentration of 200 mg L -1 managed to increase the length of transplants by 30%, compared to the control. Methionine at 100 and 200 mg.L -1 increased the amount of nitrogen in transplanted Broccoli by 36% and 38%.

Effect of Pluramin and iron and zinc nano-fertilizer on rainfed chickpea (Cicer arietinum L.) at on-farm conditions

“…Improving secondary branch in this study may be attributed to increasing gibberllic acid and indole acetic acid by amino acid spraying that reported by Talaat et al (2005) or increasing cell division, cell enlargement and consequently growth parameters that were found by Shekari and Javanmardi (2017). Improved leaf area, shoot dry weight and nutrition concentrations in leaves and pods could increase significantly when plants treated by amino acids foliar applications (Shekari and Javanmardi, 2017;Souri et al, 2018).…”

“…The great efficacy of amino acids foliar application were proven by some researchers, for example increasing yield and its components of broad bean seeds (Shafeek et al, 2016), improvement of yield and its attributes and also reduce hazards of drought stress of wheat (Hammad and Ali, 2014), improvement of chemical fruit properties and yield of squash (Abd El-Aal et al, 2010), higher pod yield of bean (Souri et al, 2018), increased fresh and dry biomass of broccoli (Shekari and Javanmardi, 2017) and increasing of grain yield of winter wheat (Popko et al, 2018).…”

Exogenous Application of Amino Acids Improves the Growth and Yield of Lettuce by Enhancing Photosynthetic Assimilation and Nutrient Availability

“…Third, the ability of L-methionine to be converted into polyamines and enlarge by entering the hormone structures [64] allows nitrogen movement between cells and organs [65]. It also functions as a buffer and behaves as a source of carbon and energy [66], and as a precursor of spermidine and gibberellin biosynthesis [43,67], growth regulators, and many secondary metabolites [43]. L-methionine also acts as a growth regulator of cytokinin, brassinosteroids, and auxin, increasing the initiation of roots; helps with the absorption of more nutrients by the plant [39,67], which may stimulate endogenous hormone homeostasis [68,69]; and is required for the development of hairy roots [67] at optimum levels.…”

“…In view of the synthetic pathway of vitamin C and the synthesis of ascorbic acid requiring plant climatic changes and the conditions of plant sustenance, it may be hypothesized that whatever factor builds the sugar (or glucose) content in plant tissues can thus increase the vitamin C content [78]. It has been reported that amino acids [43] and nitrogen fertilizers do not impact the vitamin C content in broccoli. Conversely, in cauliflower, when nitrogen fertilizers are extended from 80 kg to 120 kg per ha, the ascorbic acid content is reduced by 7% [79].…”

“…All of these biomolecules contain sulfur moieties that act as functional groups and are derived from L-methionine. In plants, L-methionine biosynthesis plays a central role in fixing inorganic sulfur from the environment, providing the only metabolic sulfide donor for the generation of glutathione, phytochelatins, iron-sulfur clusters, vitamin cofactors, and multiple secondary metabolites [42,43].…”