Effects of water stress and recovery periods on total lipid and fatty acids in Cucumis melo var. flexuosus (L.) Naudin and related species

Abstract

Water stress (drought) is one of the most important abiotic factors influencing plant growth parameters, accompanied by changes in biomass ratios and physiological and biochemical alterations depending on the severity and duration of drought exposure, as well as plant species. Total lipids and fatty acids (FA) are major components of the plant cell, and can be used to understand changes in cell lipid concentrations under water stress. In this study, the aim was to investigate the responses of total and fatty acids (FA) being major components of the plant cell, are required to be understood of changes of compositions of cell lipids under two water stress levels and recovery periods by rewatering of Cucurbitaceae members. Total lipid and gas liquid chromatography (GLC) analyses indicated that the species behaved differently with respect to water stress levels and recovery periods. Linolenic (18:3) and eiocosenoic acid (20:1) accounted for the biggest proportion of FA in all species. The major effect of water stress was seen in proportions of 18:3, which increased significantly in leaves of Cucurbita pepo under moderate stress (MS) and severe stress (SS) , whereas it remained unchanged in Cucumis melo under both treatments, but decreased significantly under SS in Ecballium elaterium. During recovery, further changes in FA percentages occurred at different rates in individual species. For the short recovery period determined after 2 days rewatering, the total leaf lipid content increased significantly in previously stressed plants. The effect of the longer recovery period (4d rewatering), was accompanied by a continued increase of total lipid content in all plants in previous MS and SS treatments, and was significant in MS and SS Ecballium compared to control plants.

Roles of Some Abiotic Stresses on Plant Growth Characters

“…Behrouz et al [36] similar documented in certain halophytes that the distance of xylem vessels decreased sharply to 800mM after saline treatment, and that phloem measurement decreased under NaCl stress. A study by Akinci et al [37] showed that under salt stress conditions, the most physical and morphological characteristics such as stem transverse spacing, stem length, metaxylem breadth, vascular clusters, and phloem width were decreased, and salt stress conditions resulted in abnormal decreases in stem height, leaf zone records, leaf number, new growth, and dry weight in cotton (Gossypium hirsutum) plants and some Cucurbitaceae species They stated the pressure conditions effect on morphological characters as well as changes bio-mass proportion and that similar outcomes could be observed on Salvia officinalis [38] ; Thymus capitatus [9,39] ; Nigella sativa [40] ; and basil [41] .…”

What is Artificial Intelligence?

“…Neredeyse her bitki doğrudan ya da dolaylı olarak su kaynağından etkilenir (Akıncı, 1997). Bitkiler, temel besin kaynaklarından biri olarak, gerek doğal ortamlarında gerekse de tarımsal faaliyetlerde, çimlenme ve büyüme dönemlerinde suya ihtiyaç duyarlar.…”

Dual effect of the presence of fruits on leaf gas exchange and water relations of olive trees

“…Different studies (Akinci andLosel 2010, Thalmann andSantelia 2017) suggest that starch is accumulated during the day, it is hydrolysed later on into organic acids and soluble sugars, which are transported during the night to guarantee carbon in the sink organs. Thus, starch can be a precursor of soluble sugars involved in osmotic and stomatal adjustment processes during abiotic stresses (Krasensky andJonak 2012, Horrer et al 2016).…”