Effect of Foliar Spray with IAA and GA3 on Production and Protein Synthesis of Two Summer Squash Hybrid Cultivars

Abstract

rapidly alters gene expression and protein synthesis (Nemhauser et al., 2006 andGoda et al., 2008). Overall, hormone-responsive genes include those involved in hormone regulation, metabolism, signal transduction, transcription, protein synthesis, cell expansion and division. In addition, genes regulated by hormones are involved in hormone distribution and homeostasis as well as in negative transcriptional feedback. In Arabidopsis, hormone treatments for short periods (<1 h) changes the expression of ~10-300 genes, with roughly equal numbers of genes repressed and activated (Nemhauser et al., 2006, Goda et al., 2008and Paponov et al., 2008. Several scientists had studied the changes in gene expression and protein synthesis in different plant species treated with GA 3 (

Modulation of Polar Auxin Transport Identifies the Molecular Determinants of Source-Sink Carbon Relationships and Sink Strength in Poplar

“…Other studies in woody plants, for example in Oak, used a higher concentration of up to 200 μM of NPA (Valladares et al 2020), which was directly applied at the site of root initiation to inhibit root formation. Despite Auxin being a plant growth regulator, a higher concentration of foliar sprayed auxin negatively impacted plant height and biomass yield (Nassef and El-aref 2018; Di Benedetto et al 2015; Rastogi et al 2013), therefore highlighting the need to optimize the hormone concentration based on the plant species studied. We tested and used an optimal concentration of AI for foliar spraying to avoid chemical stress on source leaves, as shown by no reduction in leaf number or leaf dry weight under AI-condition (Fig.2 and supplementary file S1).…”

“…Since there were no earlier reports of foliar spraying of these auxin modulators in poplar, we optimized the spraying concentration based on (i) our previous experiences in foliar spraying in other plant species like Petunia hybrida (Ahkami et al 2013) which served as our base concentration, and (ii) published literatures on woody plants where NPA (auxin 7 inhibitor) were directly sprayed at the root initiation site which served as our upper limit concentration (Valladares et al 2020). We were mindful of the fact that very high concentrations of these synthetic auxin modulators can result in chemical stresses on source leaves with potential reduction in plant biomass development, as reported in other studies (Nassef and El-aref 2018;Di Benedetto et al 2015;Rastogi et al 2013). Based on these factors, in our pilot experiment, we optimized AE and AI concentrations that resulted in changes in root phenotype but not altered source leaf growth in terms of the number of leaves, leaf greenness, and dry weight.…”

Template-free microwave-assisted hydrothermal synthesis of manganese zinc ferrite as a nanofertilizer for squash plant (Cucurbita pepo L)

“…The experimental design was a split plot design, with the main plot including the various ferrite nanofertilizer samples prepared at different temperatures and the various concentrations arranged randomly within the sub-plots. Squash plants were sprayed with the ferrite nanofertiliser 20 days after sowing, with the fertilization, weed control and disease resistance, and irrigation of squash plants executed according to the recommendations of the Egyptian Ministry of Agriculture [41].…”

Efficacy of auxin foliar application on the growth and yield of green Romaine (Lactuca sativa L. var. Jericho) grown under nutrient film technique (NFT) hydroponic system

“…The plant height of summer squash (Cucurbita pepo L. var. Rosina) increased from 40.78 cm to 51.75 cm at a low concentration of auxin at 10 ppm [9]. According Mir et al [10], auxin at 10 -8 M concentration had increased the plant growth, as well as boost the physical and biochemical activities of brown mustard (Brassica juncea).…”