Comparison of effect of salt stress on the cell death in seminal root and lateral root of rye seedlings by the modified TUNEL method

Ogawa, Atsushi; Shirado, Sakiko; Toyofuku, Kyoko

doi:10.3117/plantroot.6.5

Cited by 2 publications

(1 citation statement)

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“…These processes may cause the shoot to remain smaller (Shahid et al, 2011). The reason for better performance of cultivar Red possibly may be that its root system might have developed certain mechanisms to cope with salt stress (Ogawa et al, 2011). The vigorous growth of root in cultivar Green at 100 mM NaCl proved it to be tolerant up to that level (Tucker et al, 1994;Sun et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Salinity-induced structural and functional changes in 3 cultivars of Alternanthera bettzickiana (Regel) G.Nicholson

Younis¹,

Riaz²,

Ikram³

et al. 2013

Turk J Agric For

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Three cultivars of Alternanthera bettzickiana (Regel) G.Nicholson have been evaluated for their tolerance and adaptability potential to salt stress. During the experiment, 5 salt regimes were maintained: 18 (control), 50, 100, 150, and 200 mM NaCl. Salinity adversely affected all growth shoot length and leaves per plant. Root fresh and dry weight decreased with an increase in salinity levels in all 3 cultivars. A. bettzickiana 'Green' was the most tolerant among the cultivars under study, with relatively lower ion leakage through roots, larger vascular region area, and wide metaxylem vessel in roots and stems recorded. Also observed were greater phloem and pith cell area in stems that increased midrib thickness, cortical cell area, vascular bundle area, and metaxylem area in leaves with increase in salinity level. Moreover, the vascular region area in roots, cortical cell area, vascular region thickness, metaxylem area, phloem cell area and pith cell area in stems, leaf thickness, epidermal thickness, cortical cell area, vascular bundle area, and metaxylem area in leaves were recorded in this cultivar with an increase in salinity levels. All cultivars showed increased Na + and Clcontent and decreased K + and Ca 2+ with an increase in the salt level of the medium.

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Section: Discussionmentioning

confidence: 99%

Salinity-induced structural and functional changes in 3 cultivars of Alternanthera bettzickiana (Regel) G.Nicholson

Younis¹,

Riaz²,

Ikram³

et al. 2013

Turk J Agric For

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Germination and Some Morphophysiological Traits of Convolvulus arvensis in Response to Salinity Stress

Jamshidizadeh

Farzaneh

Ghahfarokhi

et al. 2021

Iranian J. Seed Res.

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Introduction: It is obvious that all plants adopt mechanisms to control NaCl accumulation because sodium chloride is the most soluble and most abundant salt. Binweed (Convolvulus arvensis L.) is among the ten widespread noxious weeds in the world that it is reproduced by seed, horizontal lateral root, and rhizome. Because of the extensive underground root system of the bindweed with abundant buds and established root reserves, binweed competes more tolerant than crops under salinity and drought stress. More information on morphophysiological traits of binweed under salinity conditions and comparison of salinity tolerance index between germination and seedling can also be contributed to the most effective management. In order to investigate the germination and seedling growth characteristics of binweed two experiments were conducted separately under salinity stress.Materials and Methods: Germination experiment was done in a completely randomized design with 9 levels of salinity stresses include 0 (control), 5, 10, 15, 20, 25, 30, 35, and 40 dS.m -1 , with four replications in the lab. The seedling experiment was performed in a random complete block design consisted of five levels of salinity (tap water, 10, 20, 30, and 40 dS.m -1 ) with three replications as the pot in a non-shade greenhouse of Agricultural College of Shahid Chamran University of Ahvaz.Results: The results showed that with raising salinity, percentage germination and vigure index of seed declined, but Radicle/ Plumule ratio rose. After two weeks, in response to salinity a decrease in root and shoot characteristics of the seedling was observed. Salinity stress data were fitted to a three-parameter logistic for seedling stage showed that the salinity levels higher than 7.86 dS.m -1 led to 50 percent reduction in tolerance index. It was found that 19.84 dS.m -1 caused 50% decrease in the tolerance index at germination stage. Sufficient tolerance index growth stage variation in response to salinity was found which suggests that bindweed tolerance to salinity at germination stage is about 3 times more than that of seedling stage.Conclusions: Radicle/ plumule ratio at germination stage and root lateral branches at seedling stage increased in concentrations of up to 25 and 20 dS.m -1 , respectively. It seems the maintenance of root area and branches in response to increased salinity provide an acceptable mechanism of salinity tolerance for binweed. According to the three-parameter logistic model, the salinity tolerance of bindweed at germination and seedling stages was estimated at 20 and 8 dS.m -1 , respectively.

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Comparison of effect of salt stress on the cell death in seminal root and lateral root of rye seedlings by the modified TUNEL method

Cited by 2 publications

References 5 publications

Salinity-induced structural and functional changes in 3 cultivars of Alternanthera bettzickiana (Regel) G.Nicholson

Salinity-induced structural and functional changes in 3 cultivars of Alternanthera bettzickiana (Regel) G.Nicholson

Germination and Some Morphophysiological Traits of Convolvulus arvensis in Response to Salinity Stress

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