EFFECTS OF SALT STRESS ON SOME GROWTH PARAMETERS AND BIOCHEMICAL CHANGES IN BEAN (Phaseolus vulgaris L.)

Abstract

Salinity is one of the most important abiotic stresses that affect plant cell metabolism and reduce plant productivity. In the study, some growth and biochemical characteristics of two different types of dwarf and lantern beans were investigated. The study was carried out in an aeroponic environment in a fully controlled climate room with 6 repetitions according to a completely randomized experimental design. In the experiment where two bean types (dwarf and pole types) were used as material, four different salt doses (0, 25, 50, 100 mM NaCl) were used for the salt stress conditions desired to be created. In the study, root length, seedling length, seedling fresh and dry weight, root fresh and dry weights, and leaf area were measured as some growth parameters, while MDA, APX, CAT, SOD activities, and proline and chlorophyll content were observed as biochemical parameters.For both genotypes, salinity induced a marked reduction in growth parameters. In parallel with the aggravation of salinity stress conditions, an increase in MDA, SOD, and proline content occurred. In the other investigated biochemical enzyme activities (APX and CAT), there was an increase up to a certain dose compared to the control and a decrease in the subsequent doses. Additionally, it has been determined that chlorophyll content is stable until the third dose but a significant decrease started after the fourth salt application. These results show that there has been a significant increase in enzymatic defense systems to reduce the effects of salt-induced stress in beans, and it has been observed that dwarf and pole bean types show close responses to salt stress.

Building the Resilience of Marginal Rural Areas Using a Complementary Characterization Approach: Possible Beneficial Health Effects and Stress Tolerance of Italian Common Bean (Phaseolus vulgaris L.) Landraces

“…However, plant salt tolerance is dependent on the growth development stage [26]; the germination and early seedling stages are known to be the most sensitive to stress, as also reported in common bean varieties [27,28]. Although severe impairments are commonly described in P. vulgaris plants under salinity conditions [29,30], several cultivars respond better to salt stress [31][32][33], also demonstrating high potential for salinity tolerance during early vegetative growth. Thus, the observed substantial diversity in salinity tolerance among landraces could represent an important prerequisite for identifying stress-tolerant traits/markers able to address the threats posed by climate change.…”

SALINITY STRESS AS AN ABIOTIC FACTOR AT GERMINATION STAGE ON DRY BEAN (Phaseolus vulgaris L.) CULTIVARS

“…At the same time there are some studies about the salt effect on enzymatic and non-enzymatic antioxidant defence system in Phaseolus vulgaris L. (Taïbi et al, 2016), on physiological response (Gama et. al., 2007;Arteaga et al, 2020;Çirka et al, 2022), and on alleviation of salt stress (Stoeva and Kaymakanova, 2008;Desoky et al, 2019). The objective of this study was to evaluate the salinity stress point of the highly similar two cultivars by germination and seedling growth in Petri.…”