Growth and oxidative defense response to silicon application on rice (Oryza sativa L. ‘Sembada Merah’) under salinity stress

Fatikhasari, Zidny; Rachmawati, Diah

doi:10.1063/5.0015863

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…Si addition decreased the root length in salt-induced BRRI dhan48 but increased in the Binadhan-10 compared with their respective controls ( Figure 1 D). Several reports also revealed that shoot height, shoot fresh and dry weight increased with Si supplement, thus reducing the salinity effect in barley and rice [ 27 , 34 , 35 , 36 ].…”

Section: Discussionmentioning

confidence: 99%

Assessing Silicon-Mediated Growth Performances in Contrasting Rice Cultivars under Salt Stress

Somaddar

Dey

Mim

et al. 2022

Plants

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Silicon (Si) application has great potential to improve salt tolerance in a variety of crop plants. However, it is unclear how Si influences the responses of contrasting rice cultivars when exposed to excessive salt. Here, we investigated the functions of Si in alleviating the negative effects of salt stress on two contrasting rice cultivars, namely BRRI dhan48 (salt-sensitive) and Binadhan-10 (salt-tolerant). Rice seedlings was pre-treated with three doses of Si (as silicic acid; 0, 1 and 2 mM) for 14 days at one-day interval before being exposed to salt stress (10 dSm−1) in a sustained water bath system. The results demonstrated that the seedlings of BRRI dhan48 and Binadhan-10, respectively exhibited substantial reductions in shoot height (16 and 9%), shoot fresh weight (64 and 43%) and shoot dry weight (50 and 39%) under salinity. Intriguingly, BRRI dhan48 pre-treated with 1 and 2 mM Si, respectively, showed a higher increase in shoot height (SH) (by 25.90 and 26.08%) as compared with Binadhan-10 (by 3 and 8%) under salt stress compared with their respective controls. Data revealed that a comparatively higher improvement in the growth performances of the salt-induced Si pre-treated BRRI dhan48 than that of Binadhan-10. For example, 1 and 2 mM of Si treatments significantly attributed to elevated leaf relative water content (RWC) (13 and 22%), proline (138 and 165%), chlorophyll a (42 and 44%), chlorophyll b (91 and 72%), total chlorophyll (58 and 53%) and carotenoids (33 and 29%), and recovery in the reductions of electrolyte leakage (13 and 21%), malondialdehyde content (23 and 30%) and shoot Na+/K+ ratio (22 and 52%) in BRRI dhan48 compared with Si-untreated control plants under salt stress. In addition, we found salt-tolerant Binadhan-10 also had enhanced RWC (9 and 19%), proline (12 and 26%) with pre-treatment with 1 and 2 mM of Si, respectively, under salt stress, while no significant differences were noticed in the case of photosynthetic pigments and Na+/K+ ratio. Our results showed that Si supplementation potentiated higher salt-tolerance ability in the salt-sensitive BRRI dhan48 as compared with salt-tolerant Binadhan-10. Thus, Si application could be highly beneficial in the growth recovery of the salinity-affected salt-sensitive high yielding rice cultivars in the saline-prone areas.

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Section: Discussionmentioning

confidence: 99%

Assessing Silicon-Mediated Growth Performances in Contrasting Rice Cultivars under Salt Stress

Somaddar

Dey

Mim

et al. 2022

Plants

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“…These enzymes consisted of SOD, CAT, and APX. Those three enzymes that work in chain reactions converting ROS into a more stable compound harmless to cells include H2O and O2 (Refli et al 2014;Fatikhasari and Rachmawati 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Plants increase the production of antioxidants to minimize the detrimental effect of ROS and normalize metabolic activity during drought. SOD is specifically involved in a chain reaction that catalyzes the conversion of O2to H2O2, which is then reduced to water by APX, GR, and CAT (Refli and Purwestri 2016;Nahar et al 2018;Fatikhasari and Rachmawati 2020). Specifically, APX's catalytic activity utilizes ascorbate as an electron donor.…”

Section: Discussionmentioning

confidence: 99%

Proline-related gene expressions contribute to physiological changes of East Nusa Tenggara (Indonesia) local rice cultivars during drought stress

et al. 2022

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Abstract. Salsinha YCF, Nurbaiti S, Sebastian A, Indradewa D, Purwestri YA, Rachmawari D. 2022. Proline-related gene expressions contribute to physiological changes of East Nusa Tenggara (Indonesia) local rice cultivars during drought stress. Biodiversitas 23: 3573-3583. An osmoregulation response is one of the mechanisms of adaptation to drought stress. Concerning the synthesis and catabolism of proline as an osmoprotectant, this research aims to study the involvement of proline in regulating physiological change in local rice cultivars from Nusa Tenggara Timur (NTT), Indonesia. Five rice cultivars consisting of Ciherang (drought susceptible) and Situ Bagendit (drought tolerant) and three local rice cultivars, namely Gogo Jak (GJ), Kisol Manggarai (KM), and Boawae Seratus Malam (BSM) were used. Drought treatments were carried out using the fraction of transpirable soil water (FTSW) with control (FTSW 1) and severe drought (FTSW 0.2). The upregulation of OsP5CS and OsP5CR as proline synthesis genes in GJ leaves led to higher proline levels. At the KM cultivar, there was an upregulation of OsPRODH related to proline catabolism. Furthermore, OsNHX1, responsible for proline transport, was higher in the GJ cultivar. The presence of proline also correlated with physiological adaptations. Proline accumulation due to the activation of proline-related gene expressions caused less physiological changes and antioxidant activity reduction and has led to maximum water absorption during a severe drought in the BSM cultivar. The analysis showed non-significant decreased levels of chlorophyll-a and increased levels of chlorophyll-b, carotenoids, and anthocyanins of drought-tolerant cultivars lead to higher leaf number, plant height, and tiller number under drought. Meanwhile, varied activity levels of superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) were observed in line with the slight increase in H2O2 and malonaldehyde (MDA) levels during severe drought.

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The combined use of silicon and arbuscular mycorrhizas to mitigate salinity and drought stress in rice

Etesami

Maathuis

et al. 2022

Environmental and Experimental Botany

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Growth and oxidative defense response to silicon application on rice (Oryza sativa L. ‘Sembada Merah’) under salinity stress

Cited by 3 publications

References 20 publications

Assessing Silicon-Mediated Growth Performances in Contrasting Rice Cultivars under Salt Stress

Assessing Silicon-Mediated Growth Performances in Contrasting Rice Cultivars under Salt Stress

Proline-related gene expressions contribute to physiological changes of East Nusa Tenggara (Indonesia) local rice cultivars during drought stress

The combined use of silicon and arbuscular mycorrhizas to mitigate salinity and drought stress in rice

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