Effect of Elevated Tropospheric Ozone on <i>Vigna Mungo</i> L. Varieties

Dhevagi, Periyasamy; Ramya, Ambikapathi; Priyatharshini, Sengottiyan; Poornima, R.

doi:10.1080/01919512.2021.2009332

Cited by 10 publications

(5 citation statements)

References 69 publications

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“…The findings suggest that greater O 3 influx under EO 3 conditions resulted in significant membrane damage in both kinds of Indian beans at both development phases. A 90.2% increase in MDA contents in Vigna mungo L. varieties was reported on exposure to EO 3 conditions as compared to AO 3 conditions (Dhevagi et al, 2021). Since lipid peroxidation is an important marker of O 3 stress tolerance (Iglesias et al, 2006), Kashi Sheetal which showed a lesser degree of membrane lipid peroxidation under EO 3 conditions as compared to Kashi Harittima, was considered to be more tolerant of the two experimental varieties.…”

Section: Discussionmentioning

confidence: 95%

“…The analysis of yield parameters showed a significant reduction in the EO 3 conditions in comparison to AO 3 conditions which accounts for both varieties of Dolichos lablab L. at all ages of growth (Table 4). An earlier study found that the yield of selected varieties of wheat (HUW 234 and 468, HD 3086 and 3118) and black gram (CO6 and VBN 1-8) were markedly reduced under EO 3 as compared to AO 3 (Yadav et al, 2019;Dhevagi et al, 2021). Both varieties of the Indian bean exhibited a significant increase in the weight of grains plant -1 upon all doses of N amendments (N1, N2, and N3).…”

Section: Discussionmentioning

confidence: 95%

“…But the degree of increment of the activities of enzymes was insignificant between N2 and N3 treatments, suggesting the adequacy of N2 treatment in the management of O 3 stress. O 3 exposure is known to adversely affect the physiological parameters of plants, rate of photosynthesis, and stomatal conductance being directly affected (Singh et al, 2014;Tetteh et al, 2016;Dhevagi et al, 2021). This reduced photosynthetic rate caused by elevated ozone may be related to the degradation of the chloroplast structure, which prevents the production of chlorophyll under these conditions (Biswas and Jiang, 2011).…”

Section: Discussionmentioning

confidence: 99%

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Combating ozone stress through N fertilization: A case study of Indian bean (Dolichos lablab L.)

et al. 2023

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The present study investigates the efficiency of nitrogen (N) amendments in the management of ozone (O3) stress in two varieties (Kashi Sheetal and Kashi Harittima) of Indian bean (Dolichos lablab L.). Two O3 concentrations, ambient (44.9 ppb) and elevated (74.64 ppb) were used, and each O3 concentration has 3 nitrogen (N) dose treatments viz recommended (N1), 1.5 times recommended (N2), 2 times recommended (N3) and no nitrogen, which served as control (C). The experiment concluded Kashi Sheetal as O3 tolerant, as compared to Kashi Harittima. N amendments were effective in the partial amelioration of O3 stress, with N2 being the most effective nitrogen dose, at both ambient and elevated O3 concentrations. Kashi Sheetal has been determined to be O3 tolerant due to greater endogenous levels of H2O2 accumulation and enzymatic antioxidant contents with O3 exposure. The O3-sensitive variety, Kashi Harittima, responded more positively to N treatments, at both O3 concentrations. The positive effect of N amendments is attributed to the stimulated antioxidative enzyme activity, rather than the biophysical processes like stomatal conductance. Strengthened defense upon N amendments was attributed to the enhanced activities of APX and GR in Kashi Sheetal, while in Kashi Harittima, the two enzymes (APX and GR) were coupled by SOD and CAT as well, during the reproductive phase. Yield (weight of seeds plant-1) increments upon N (N2) amendments were higher in Kashi Harittima (O3 sensitive), as compared to Kashi Sheetal (O3 tolerant) at both ambient and elevated O3 concentration, due to higher antioxidant enzymatic response and greater rate of photosynthesis in the former.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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Combating ozone stress through N fertilization: A case study of Indian bean (Dolichos lablab L.)

et al. 2023

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“…The Chlorophyll Content Meter (CCM-200+, United States) was used to assess chlorophyll content in the leaves. These measurements were taken at three different points of young fully expanded leaves of each treatment during bright sunshine ( Dhevagi et al, 2022 ). Similarly, photosynthetic rate and stomatal conductance were measured using a portable photosynthesis system (ADC BioScientific LCpro-SD System, United Kingdom) ( Dhevagi et al, 2022 ).…”

Section: Methodsmentioning

confidence: 99%

Biomining Sesuvium portulacastrum for halotolerant PGPR and endophytes for promotion of salt tolerance in Vigna mungo L.

et al. 2023

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Halophytic plants can tolerate a high level of salinity through several morphological and physiological adaptations along with the presence of salt tolerant rhizo-microbiome. These microbes release phytohormones which aid in alleviating salinity stress and improve nutrient availability. The isolation and identification of such halophilic PGPRs can be useful in developing bio-inoculants for improving the salt tolerance and productivity of non-halophytic plants under saline conditions. In this study, salt-tolerant bacteria with multiple plant growth promoting characteristics were isolated from the rhizosphere of a predominant halophyte, Sesuvium portulacastrum grown in the coastal and paper mill effluent irrigated soils. Among the isolates, nine halotolerant rhizobacterial strains that were able to grow profusely at a salinity level of 5% NaCl were screened. These isolates were found to have multiple plant growth promoting (PGP) traits, especially 1-aminocyclopropane-1-carboxylic acid deaminase activity (0.32–1.18 μM of α-ketobutyrate released mg−1 of protein h−1) and indole acetic acid (9.4–22.8 μg mL−1). The halotolerant PGPR inoculation had the potential to improve salt tolerance in Vigna mungo L. which was reflected in significantly (p < 0.05) higher germination percentage (89%) compared to un-inoculated seeds (65%) under 2% NaCl. Similarly, shoot length (8.9–14.6 cm) and vigor index (792–1785) were also higher in inoculated seeds. The strains compatible with each other were used for the preparation of two bioformulations and these microbial consortia were tested for their efficacy in salt stress alleviation of Vigna mungo L. under pot study. The inoculation improved the photosynthetic rate (12%), chlorophyll content (22%), shoot length (5.7%) and grain yield (33%) in Vigna mungo L. The enzymatic activity of catalase and superoxide dismutase were found to be lower (7.0 and 1.5%, respectively) in inoculated plants. These results revealed that halotolerant PGPR isolated from S. portulacastrum can be a cost-effective and ecologically sustainable method to improve crop productivity under high saline conditions.

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“…Tropospheric O3 is a 'greenhouse' gas that contributes to current accelerated global warming (Lu et al, 2019) and the ground level O3 is among the widespread phytotoxic pollutants that is frequently reported as exceeding the World Health Organization (WHO) air quality guidelines for agricultural crops in many regions of the world (Emberson et al, 2010). Especially, tropospheric O3 is found to be a major atmospheric pollutant in South and Southeast Asia (Emberson et al, 2010), including India (Emberson et al, 2010;Dhevagi et al, 2021), Nepal and Pakistan (Emberson et al, 2010). Further, rising of mean surface O3 concentrations of 7.2 ppb is predicted for South Asia by 2030 (Dentener et al, 2006).…”

Section: Research Articlementioning

confidence: 99%

Assessing the impact of tropospheric ozone pollution on grain yield of mung bean [<em>Vigna radiate</em> (L.) R. Wilczek] using ethylenediurea: A case study in Peradeniya, Sri Lanka

Perera

Wijesooriya

Gunarathne

et al. 2021

J. Agric. Val. Add.

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Tropospheric ozone (O3) is well known to reducing the yield of ozone-sensitive crop varieties. The present study aimed to detect the impact of O3 pollution in Peradeniya, Sri Lanka on the grain yield of a local variety of mung bean [Vigna radiata (L.) R. Wilczek], using the antiozonant ethylenediurea (EDU) protocol. Mung bean plants grown in pots were exposed to ambient O3 and O3 free conditions (by adding recommended doses of EDU) in a complete randomized experimental design. Ozone sensitivity was assessed by recording the number of pods and seeds, the dry weight of pods and seeds and the shoot dry weight. The same experiment was repeated on the same site to verify the results. Tropospheric O3 concentration, daily rainfall, relative humidity (RH) and air temperature in the study location were recorded for the both study periods. The tested local mung bean variety appears to be sensitive to ambient O3 levels. Further, the O3 impact on crop yield loss appeared to be varying with the prevailing climatic conditions, especially the distribution of rainfall. Under rather dry climatic conditions that occurred towards the flowering and fruiting periods seemed causing a reduction in the number of pods and seeds of the crop with a yield loss of about 21%. This study further proved that the EDU protocol can be used to demonstrate yield loss of mung bean due to O3 pollution. As O3 impacts are better envisaged under dry climatic conditions, we suggest using the EDU protocol to identify O3 pollution in dry agro-climatic regions of the intermediate and dry zones of the country and to detect O3 sensitive crop species that grow in these dry regions.

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Effect of Elevated Tropospheric Ozone on Vigna Mungo L. Varieties

Cited by 10 publications

References 69 publications

Combating ozone stress through N fertilization: A case study of Indian bean (Dolichos lablab L.)

Combating ozone stress through N fertilization: A case study of Indian bean (Dolichos lablab L.)

Biomining Sesuvium portulacastrum for halotolerant PGPR and endophytes for promotion of salt tolerance in Vigna mungo L.

Assessing the impact of tropospheric ozone pollution on grain yield of mung bean [<em>Vigna radiate</em> (L.) R. Wilczek] using ethylenediurea: A case study in Peradeniya, Sri Lanka

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