Effects of NaCl stress on germination, antioxidant responses, and proline content in two rice cultivars

Sohn, Young Geol; Lee, Byung Hyun; Kang, Kyu Young; Lee, Jeung Joo

doi:10.1007/bf03030409

Cited by 28 publications

(11 citation statements)

References 36 publications

(48 reference statements)

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“…Also, Jamil et al (2007), mentioned that using NaCl at concentrations between 4.7 to 14.1 dSm -1 inhibited seed germination and seedling growth of two varieties of cabbage. Young et al (2005) and Zhao et al (2009). Also, the current results revealed a pronounced genotypic differences with regard to radical and plumule length.…”

Section: Wwwccsenetorg/jassupporting

confidence: 62%

Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

Abbas¹,

Ali²,

Hasan³

et al. 2012

JAS

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Salinity is one of the major threats facing the cultivation of field crops. The response of six rice (Oryza sativus L.) cultivars to different sodium chloride levels; 0, 30, 60, 90, 120, and 150 mM were investigated during germination and early seedling stages. Germination percent, mean germination time (MGT), shoot and root length and dry weight were all decreased as the levels of NaCl used increased. Percent reduction in dry weight over control was increased as the NaCl levels increased. Forat and Amber 33 were more salt tolerant cultivars with regard to germination percent, while Hwazawi cultivar was more sensitive. Hwazawi cultivar recorded the lower MGT while Amber 33 cultivar showed the higher MGT. Length of radicle and plumule of all cultivars were differently affected by salt, as Hwazawi and Mushkab cultivars showed more reduction in length while Amber 33 was less affected. Forat cultivar dry weight was more affected by salt compare to other cultivars. The effect of NaCl on salt tolerance index of cultivars was significant. The ranges of salt tolerance indices among salt levels were very wide, ranging from 95.42 at 30 mM of NaCl to 71.38 at 150 mM of NaCl. Interaction between salt levels and cultivars showed varying degree of differences. It is concluded that the different cultivars differ in their salt tolerance with respect to seed germination and seedling growth.

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Section: Wwwccsenetorg/jassupporting

confidence: 62%

Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

Abbas¹,

Ali²,

Hasan³

et al. 2012

JAS

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show abstract

“…Similar results were reported by Islam and Karim [30] who showed that eight genotypes of Thai and Bangladesh rice (Awned-1, Rajbhog-2, Khorina, Soloi, Nonasail, Patnai 23, Sadamota and Chapali) had 80-90% germinationin 160 mM NaCl. Sohn et al [31] reported that the germination percentage of rice cv. Kumnam was completely inhibited at 360 mM NaCl.…”

Section: Discussionmentioning

confidence: 99%

Enhancing Antioxidant Properties of Germinated Thai rice (Oryza sativa L.) cv. Kum Doi Saket with Salinity

Umnajkitikorn¹,

Faiyue²

2016

J Rice Res

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“…Salt causes harmful effects on crop plants by generating or accumulating ROS that leads to disturbance of cellular homeostasis, followed by oxidative stress [14,39,43]. There are many reports that ROS generated from salt stress causes problems in the metabolism of chloroplasts [3,22,40].…”

Section: Discussionmentioning

confidence: 99%

Responses of Photosynthetic Efficiency and Ascorbate Peroxidase Induced by Salt Stress in Rice (Oryza sativa L.)

Koo¹,

Im²,

Chun³

et al. 2010

Journal of Life Science

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We investigated changes in photosynthesis and activity of ascorbate peroxidase (APX) that scavenges ROS as responses to oxidative stress induced by salinity in rice (Oryza sativa L.). Photosynthetic efficiency of rice leaves, monitored in terms of Fv/Fm, declined with the increase of salt concentration (100-300 mM NaCl). Salinity caused an increase of H2O2 in leaves of rice, with an increase of APX activity. Among total APX isoforms, an isoform of stromal-APX 1 in leaves of rice was completely inactivated by 300 mM NaCl, but was not affected by chilling or drought. The results suggest that salt stress acts in quite a different mechanism in relation to the activity of stromal-APX from that of other stresses such chilling and drought. We carried out RT-PCR for analysis of genes expression of APX isoforms as affected by salt stress. The expression of cytosolic APX / thylakoid-bound APX genes in leaves of rice exposed to salt stress was increased, while stromal APX gene expression rapidly declined.Key words : Rice, salt stress, ascorbate peroxidase (APX), stromal APX gene, Fv/Fm *Corresponding author *Tel：+82-51-890-1525, Fax：+82-51-890-1521 Introduction Abiotic stress such as drought and salinity causes considerable damages to crop worldwide [4,8,31]. When plants are exposed to abiotic stresses, they experience functional disorder of metabolism including oxidative stress, osmotic stress and ionic imbalance [13,20,32]. Salinity induces oxidative stresses in plants by increasing reactive oxygen species (ROS) such as superoxide, hydrogen peroxide and hydroxyl radical [11,26] APX can easily eliminate H2O2 with high affinity in the cytosol, chloroplasts (stroma and thylakoid membrane) and other subcellular locations (microbody) [9,16,37]. These APX isoforms have been separated from spinach chloroplasts, tea leaves and plastids of tobacco, followed by many studies on their enzymatic/molecular properties [6,29,35]. The significant differences of those isoforms are apparent in their physico-chemical and kinetic properties. Compared to cytosolic form, chloroplastic isoforms (tAPX and sAPX) have very short life time in the culture medium without ascorbic acid (AsA) and their sensitivity to thiol reagents as well as to inhibitors (such as hydroxylamine) is much higher than their cytosolic counterparts [6,7]. ROS metabolism in a particular compartment can effect the different cellular compartments. The application of light stress to Arabidopsis has been reported in the induction of cytosolic. But not induce chloroplastic ROS removal enzymes [10,18,19,33].Several studies showed that activity of cytosolic/chloroplastic APX is important in protecting plant cells from oxida- 생명과학회지 2010, Vol. 20. No. 8 tive stress, which is one of many dysfunctions caused by salt stress [3,40]. We investigated changes in photochemical efficiency, activity of ascorbate peroxidase (APX) as well as its mRNA expression induced by oxidative stress in rice leaves that had been exposed to salinity. The observations suggested that a salinity-induced in...

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Effects of NaCl stress on germination, antioxidant responses, and proline content in two rice cultivars

Cited by 28 publications

References 36 publications

Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

Salt Tolerance Study of Six Cultivars of Rice (Oryza sativa L.) During Germination and Early Seedling Growth

Enhancing Antioxidant Properties of Germinated Thai rice (Oryza sativa L.) cv. Kum Doi Saket with Salinity

Responses of Photosynthetic Efficiency and Ascorbate Peroxidase Induced by Salt Stress in Rice (Oryza sativa L.)

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