Exogenous Nitric Oxide and Silicon Applications Alleviate Water Stress in Apricots

Abstract

Many plants confront several environmental stresses including heat, water stress, drought, salinity and high-metal concentrations that are crucial in defining plant productivity at different stages of their life cycle. Nitric oxide (NO) and Silicon (Si) are very effective molecules related in most of them and in varied biochemical events that have proven to be protective during cellular injury caused by some stress conditions like water stress. In the current work, we studied the effect of Si and NO alone and NO + Si interactive application on the response of plants exposed to water deficiency and well-watered plants for the Milord apricot variety. Water stress caused a reduce in chlorophyll content, dry and fresh weight, leaf area, stomatal conductivity, leaf relative water content and nutrient elements, while it caused an increase in leaf temperature, leaf proline, leaf malondialdehyde (MDA) content and membrane permeability. Si, NO and Si + NO combination treatments under water stress conditions significantly decreased the adverse effects of water stress on leaf temperature, leaf area, dry and fresh weight, stomata conductivity, relative water content, membrane permeability, L-proline and MDA content. The shoot dry weight, chlorophyll content, stomata conductivity and leaf relative water content in Si + NO treated apricot saplings increased by 59%, 55%, 12% and 8%, respectively. Combined treatment (Si + NO) was detected to be more effective than single applications (Si or NO) on some physiological, biochemical, morphological and nutritional properties of apricot under water stress conditions.

Remediation of Cadmium Stress in Strawberry Plants Using Humic Acid and Silicon Applications

“…Therefore, humic acid could mitigate the negative effects of Cd stress on morphological, physiological and biochemical parameters in wheat plants [62]. The effects of HA, Si and NO treatments were also detected by some authors [34,63,64], who stated that their treatment promoted plant development and oxidative stress tolerance in plum, apricot and strawberry.…”

Endophytic Bacillus pumilus G5 Interacting with Silicon to Improve Drought Stress Resilience in Glycyrrhiza uralensis Fisch. by Modulating Nitrogen Absorption, Assimilation, and Metabolism Pathways

“…The determination of relative water content (RWC) in G. uralensis seedlings leaves followed the protocol outlined by Bakır et al RWC false( % false) = 100 % × false( W f − W d false) / false( W t − W d false) where W f represents the fresh weight, W t represents the saturated fresh weight, and W d represents the dry weight.…”

Effects of glutamic acid applications on the yield and growth parameters in garlic (Allium sativum L.) cultivation

“…The parameters examined here were found to be consistent with the literature. In previous studies examining garlic and onion (Shalaby and El-Ramady, 2014;Sitaula et al, 2020;Kibar, 2022), potato (Röder et al, 2018), apricot (Bakır et al, 2022), and vegetable, the leaves of which are consumed such as mellow, lettuce, and spinach (Chen et al, 2016;Greenwell and Ruter, 2018) Table 5. Effects of L-GLU treatments on bulb yield and ash (%) contents of garlic samples (100 GLU: 100 mg L -1 L-Glutamic acid, 200 GLU: 200 mg L -1 L-Glutamic acid; 400 GLU: 400 mg L -1 L-Glutamic acid; 800 GLU: 800 mg L -1 L-Glutamic acid; 1000 GLU: 1000 mg L -1 L-Glutamic acid; ± Standard errors of three repeat experiments) Effects of L-GLU treatments on total soluble amino acid, total nitrate, total polyphenol, and ascorbic acid contents of garlic…”

“…Researchers reported that, in comparison to NH 4 + , three times more energy is consumed during the assimilation of NO 3 (Cheng et al, 2016;Zhang et al, 2019). Hence, exogenous amino acid treatments might offer advantages in increasing the plant yield and stimulating the resistance to stress (Hildebrandt, 2018;Haghighia et al, 2020;Bakır et al, 2022). Since glutamic acid is an important ammonium recipient, it transforms into other amino acids such as proline, glycine, and arginine, as well as playing important roles in chlorophyll synthesis, activation of vegetal hormones, cell division, and phytochelatin activities (Sun et al, 2019;Ren et al, 2022).…”

“…Since glutamic acid is an important ammonium recipient, it transforms into other amino acids such as proline, glycine, and arginine, as well as playing important roles in chlorophyll synthesis, activation of vegetal hormones, cell division, and phytochelatin activities (Sun et al, 2019;Ren et al, 2022). In previous studies carried out on the solutions for problems affecting the quality and yield in garlic cultivation in Turkey, besides the chemical or mineral treatments and organicinorganic fertilizer applications in soil, also the practices such as planting depth/distance and planting season are widely employed (Turan et al, 2013;İkinci et al, 2021;Bakır et al, 2022;Kibar, 2022). However, there is no comprehensive study examining the effects of amino acid derivatives on the yield, chemical content, and shelf-life of garlic bulbs.…”