Evaluation of Tomato Germplasm for Salinity Tolerance at the Seedling Stage

Abstract

Salinity consists of critical abiotic stress adversely affecting tomato growth and development. Given the increase in saline areas, breeders endeavor to develop crops that can tolerate salinity. It indicates the importance of genotypes that can grow in salt-affected soil to cope with the problem. This study focused on identifying salt-tolerant and salt-sensitive genotypes using Principal Component Analysis (PCA). This study used a two-factor factorial under a complete randomized design, with three replications and three levels (T0 = control, T1 = 6 dS/m, T2 = 12 dS/m) of salt (NaCl) treatment. Data collection ensued at the seedling stage. Data for various morphological and biochemical attributes were recorded and subjected to analysis of variance and PCA to check the variation in germplasm and identification of suitable genotypes. Analysis of variance showed significant results for all attributes indicating the presence of variability in germplasm. Using PCA identified tolerant and non-tolerant tomato genotypes. Based on the results obtained from PCA analysis, genotypes AUT-318, CLN-2498A, 17884, Picendanto, 17260, 17256, 17263, and 17266 showed as salt tolerant, whereas the 19903, 19908, Target-66, H-24, 17255, Nadir, and Peelo displayed as salt-sensitive genotypes. Selected genotypes suit further use for the development of breeding material.

Tomato: An Overview of Application of Turmeric (Curcuma longa L.), Neem (Azadiratcha indica) on Shelf-Life Extension During Post-Harvest Storing of Tomato (Solanum lycopersicum L.)

“…Food preservatives are beneficial in preserving the nutrients of many food materials to satisfy the demands of the consumers through an improvement in texture, colour, taste, etc. (Kumar et al, 2015;Udah, 2021). Ideally, preservatives addition in foods helps to maintain several different qualities.…”

An Optimized Protocol for Comprehensive Evaluations of Salt Tolerance in Crop Germplasm Accessions: A Case Study of Tomato (Solanum lycopersicum L.)

“…Integral to the reliability of these evaluations is the construction of the evaluation index system, which significantly impacts the results' accuracy and stability [14,36]. Although prior studies have identified various early-stage traits of tomato as potential indicators of salt tolerance [12,20], the indiscriminate integration of these traits into evaluation systems can compromise the assessment's precision and stability [37]. To this end, this study systematically optimized the comprehensive evaluation process, developing a protocol that enhanced the assessment's stability and accuracy when applied to tomato germplasm salt tolerance.…”

“…Additionally, tomatoes serve as a model plant for studying economically important traits, such as fruit development and flavor quality [18,19]. Nonetheless, as a moderately salt-sensitive crop, common tomato varieties typically exhibit limited salt tolerance [20,21]. Rising soil salinity levels have led to significant tomato yield losses, amounting to billions of dollars annually.…”

“…Therefore, identifying salt-tolerant tomato germplasm and generating new germplasm-especially those tolerant at the seedling stage-is of paramount importance for improving tomato yield and quality. Research has illustrated that differences in genetic background, experimental conditions, treatment methods, and growth stages of tomatoes, coupled with the complexity of salt tolerance mechanisms, often lead to diverse salt tolerance evaluation methods and evaluation index systems-a phenomenon widely observed in research on salt tolerance and other stress resistance in various crops [1,20,[24][25][26]. This variability results in two predominant issues:…”

Influence of different production systems and tomato genotypes on the content of macroelements in tomato fruits

“…Magnesium is an essential element required as a cofactor for over 300 enzymatic reactions and is therefore necessary for the biochemical functioning of numerous metabolic processes [4]. Sodium is vital in the human body for regulating blood pressure, stimulating nerves and muscles; calcium has some very important life-supporting functions because it is a structural component of bones, teeth, and soft [5,6]. Phosphorus is a basic unit in DNA, and RNA and serves as an energy store in metabolic reactions of biological systems [7,8].…”