Adaptive mechanism of stress tolerance in Urochondra (grass halophyte) using roots study

Lata, Charu; Soni, Shobha; Kumar, Naresh; POOJA, POOJA; Mann, Anita; Rani, Sulekha

doi:10.56093/ijas.v89i6.90834

Cited by 10 publications

(3 citation statements)

References 15 publications

(10 reference statements)

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“…Here, we have selected two halophytes; Urochondra setulosa and Dichanthium annulatum. Urochondra setulosa is a perennial halophytic grass showing optimum growth up to 500 mM NaCl as reported earlier [8][9][10] and has also been reported to tolerate sea water salinity.…”

Section: Introductionmentioning

confidence: 66%

Physiological and differential gene expression reveals a trade-off between antioxidant capacity and salt tolerance in Urochondra setulosa and Dichanthium annulatum

Mann,

Kumar,

Lata

et al. 2023

Plant Growth Regul

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BackgroundAmong abiotic stresses, soil salinity is one of the major global constraints to growth and productivity in most of the crop plants, limiting current and future agricultural sustainability. One of the strategies to dissect the salinity tolerance phenomenon can be the study of plants growing naturally in saline environments and halophytes can serve as another model plants for salt tolerance studies. Methods and ResultsHere, we studied two un-explored halophytes, moderately salt tolerant, Dichanthium annulatum and extremely salt tolerant, Urochondra setulosa for investigating the contributory role of antioxidative system, the rst line of defence, in salinity tolerance mechanism at salinity levels of ECe ~ 30, 40 and 50 dSm − 1 (~ 300,400,500 mM NaCl). H 2 O 2 content, SOD and ascorbate peroxidase activities were higher in U. setulosa at all saline treatments whereas MDA content and catalase activity was high in D. annulatum although the speci c enzyme activities of ROS system increased with increasing levels of salinity in both the halophytes. This differential physiological expression was in parallel with the transcriptomic data generated through High throughput sequencing on Illumina platform depicting 276 and 66 differentially expressed genes coding for various components of ROS system like antioxidant activity, cell redox and glutathione metabolism in response to salinity in U. setulosa and D. annulatum respectively. In D. annulatum, H 2 O 2 is detoxi ed by increased activities of SOD, APX and catalase where as in halophyte U. setulosa, peroxidase takes over catalase to remove H 2 O 2 along with DHAR and MDHAR which signi cantly correlates with the differentially expressed transcripts. ConclusionsThe salinity responsive gene expression for ROS enzymes and antioxidants clearly differentiate between these two halophytes supporting the detoxi cation of H 2 O 2 and survival at different salinity levels. This study provides reference information on the key genes responsible for salt tolerance which can be used for related plant species for genetic improvement.

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Section: Introductionmentioning

confidence: 66%

Physiological and differential gene expression reveals a trade-off between antioxidant capacity and salt tolerance in Urochondra setulosa and Dichanthium annulatum

Mann,

Kumar,

Lata

et al. 2023

Plant Growth Regul

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“…It was also noted from the results that S. oleoides accumulated 5.81 mg/g TSS, which decreased to 4.83 mg/g at pH ~ 9.5, 5.23 mg/g and 4.38 mg/g at ECe ~ 15 and 25 dS/m. Stress caused reduction in TSS might serve as a protective molecule and also provide source of energy and carbon (Lata et al 2019) or enhance the activity of hydrolytic enzymes that lead to decreased TSS content (Pooja et al 2019).…”

Section: Resultsmentioning

confidence: 99%

Physiological adaptability of Salvadora oleoides to sodicity and salinity stress

2022

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An experiment was conducted in microplots at ICAR-Central Soil Salinity Research Institute, Karnal, Haryana during 2013–16 to study the adaptive response of Salvadora oleoides, a facultative halophyte under saline, sodic and mixed saline-sodic conditions. S. oleoides was not able to survive at higher sodicity (pH ~ 10.0) and salinity (ECe ~ 35 dS/m) as well as on the mixed sodicity and salinity levels (pH ~ 9.0 along with ECe ~ 10, 15, 20 dS/m). Stress either salinity or sodicity brought reduction in plant height, chlorophyll content and gas exchange attributes, but S. oleoides maintained gaseous exchange at moderate stress level. S. oleoides accumulated 4 fold higher proline under sodic stress and 6 fold under salinity stress. Other osmolytes, TSS and soluble protein decreased with stress intensification to maintain osmotic balance. In comparison to control, sodicity enhanced Na+ and Cl- by 54.57% and 20.33%, while under salinity, Na+ was enhanced by 141.52–256.09% and Cl- by 47.83–115.58% at ECe ~ 15 and 25 dS/m, respectively. Inspite of such higher increase in Na+ and Cl-, S. oleoides retained good amount of mean K+ (1.22%) in leaf tissue. S. oleoides also maintained leaf Na+/K+ below 1.0 under stress condition of pH ~ 9.5 and ECe ~ 15 dS/m. Based on the studied physio-biochemical analysis, Salvadora oleoides exhibited good adaptive potential under moderate salinity and sodicity stress and could be used as a promising salt-tolerant plant species for plantation in salt affected areas.

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“…Moreover, in the current study, sandalwood showed maximum (p ≤ 0.05) production of total soluble sugar with host A. ampliceps. The greater production of specific organic solutes (osmolytes) aids in maintaining the plant water status and photosynthesis as well as safeguarding the cellular machinery against harmful substances (Lata et al, 2019;Kumar et al, 2021). Moreover, during the transfer of nutrients from host to the parasite, potentially hazardous chemicals and disease infections may pass through the haustoria, causing stress in the parasitic plants that contribute to an increase in the production of osmolytes (Zagorchev et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Host–parasite interaction: an insight into the growth and physiological responses of sandalwood and associated host species

Verma,

Kumar,

Kumar

et al. 2024

Front. For. Glob. Change

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IntroductionSandalwood (Santalum album L.) is categorized as vulnerable in the IUCN Red list and is also an industrially important tree species valued for its heartwood and aromatic oil. Sandalwood is a semi-root parasite tree that relies on its host plants for its water and nutrient requirements. Therefore, there is need to understand the growth and physiological interactions between sandalwood and its hosts.MethodsSandalwood were planted with ten different host species viz., Syzygium cumini, Punica granatum, Phyllanthus emblica, Melia dubia, Leucaena leucocephala, Dalbergia sissoo, Casuarina equisetifolia, Citrus aurantium, Azadirachta indica and Acacia ampliceps to assess the interactive effect on the change in growth and physiology of both sandalwood and host tree species.ResultsThe findings revealed that sandalwood grown with hosts D. sissoo and C. equisetifolia showed higher growth performance, while among hosts, S. cumini, followed by C. aurantium and L. leucocephala, showed better growth and physiobiochemical traits. The stepwise regression analysis and trait modeling indicated that the six traits, namely, plant height, photosynthetic rate, relative water content, water potential, intercellular CO2 concentration, and total soluble protein, contributed greater growth in the sandalwood, while four traits, namely, water potential, osmotic potential, leaf area, and total soluble protein, contributed greater growth in the host species. The traits modeling study predicted greater growth of sandalwood with the hosts D. sissoo and C. equisetifolia, whereas among host species, prediction revealed greater growth of S. cumini and C. aurantium.DiscussionThe study concluded that host–parasite interaction modulated the growth and physiological processes in both sandalwood and hosts and sandalwood plantations can be successfully developed with the hosts D. sissoo and C. equisetifolia.

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Adaptive mechanism of stress tolerance in Urochondra (grass halophyte) using roots study

Cited by 10 publications

References 15 publications

Physiological and differential gene expression reveals a trade-off between antioxidant capacity and salt tolerance in Urochondra setulosa and Dichanthium annulatum

Physiological and differential gene expression reveals a trade-off between antioxidant capacity and salt tolerance in Urochondra setulosa and Dichanthium annulatum

Physiological adaptability of Salvadora oleoides to sodicity and salinity stress

Host–parasite interaction: an insight into the growth and physiological responses of sandalwood and associated host species

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