Selenium (Se) Regulates Seedling Growth in Wheat under Drought Stress

Nawaz, Fahim; Ashraf, Muhammad; Ahmad, Rashid; Waraich, Ejaz Ahmad; Shabbir, Rana Nauman

doi:10.1155/2014/143567

Cited by 58 publications

(34 citation statements)

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“…The germination data were recorded for 10 days and numbers of seeds germinated were counted daily to estimate germination percentage, promptness index, emergence index and vigour index using the following formulae as described by Nawaz et al . :

\begin{matrix} germination percentage = & (number of seeds germinated \\ / total number of seeds) \times 100 \end{matrix}

\begin{matrix} promptness index & = {n d}_{2} (1.00) + {n d}_{4} (0.75) \\ + {n d}_{6} (0.50) + {n d}_{8} (0.25) \end{matrix}

where nd 2 , nd 4, nd 6 and nd 8 represent the number of seeds germinated on the second, fourth, sixth and eighth day, respectively.

\begin{matrix} right & left emergence index = (number of seeds germinated \\ right / days of first count) + \dots \\ left + (number of seeds germinated / days of final count) \end{matrix}

vigour index = S \times truefalse\sum (G_{t} / D_{t})

where S represents seedling height on the seventh day, G t indicates total number of seeds germinated in the t ‐th day and D t is the number of days from the first day to the t ‐th day …”

Section: Methodsmentioning

confidence: 99%

Seed priming with KNO₃ mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

et al. 2017

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\begin{matrix} germination percentage = & (number of seeds germinated \\ / total number of seeds) \times 100 \end{matrix}

\begin{matrix} promptness index & = {n d}_{2} (1.00) + {n d}_{4} (0.75) \\ + {n d}_{6} (0.50) + {n d}_{8} (0.25) \end{matrix}

where nd 2 , nd 4, nd 6 and nd 8 represent the number of seeds germinated on the second, fourth, sixth and eighth day, respectively.

\begin{matrix} right & left emergence index = (number of seeds germinated \\ right / days of first count) + \dots \\ left + (number of seeds germinated / days of final count) \end{matrix}

vigour index = S \times truefalse\sum (G_{t} / D_{t})

where S represents seedling height on the seventh day, G t indicates total number of seeds germinated in the t ‐th day and D t is the number of days from the first day to the t ‐th day …”

Section: Methodsmentioning

confidence: 99%

Seed priming with KNO₃ mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

et al. 2017

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“…The healthy and physically pure seeds of two indigenous spring wheat cultivars, viz. Kohistan-97 and Pasban-90, characterized in a previous study (Nawaz et al 2014) as drought-tolerant and sensitive, respectively, were obtained from Ayyub Agricultural Research Institute, Faisalabad, Pakistan. The experiments were laid out in a split-split block design with three replications.…”

Section: Experimental Site and Layoutmentioning

confidence: 99%

Selenium supply methods and time of application influence spring wheat (Triticum aestivum L.) yield under water deficit conditions

et al. 2016

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SUMMARYIdentification of new effective strategies for improving crop yields under environmental stresses such as drought represent key priorities for researchers around the globe. In the present study, the effects of different methods of exogenous selenium (Se) supply viz. Se seed priming, Se fertigation and Se foliar spray on yield of spring wheat under normal and water deficit conditions were investigated. Two field experiments were conducted using one indigenous drought-tolerant genotype (Kohistan-97) and a sensitive genotype (Pasban-90) to understand the role of Se in improving wheat yield. The experiments were laid out in a split-split plot design with three replications during consecutive years (2011/12 and 2012/13) and the plants were exposed to water stress by withholding irrigation at two different wheat growth stages, viz. tillering and anthesis. It was noted that drought stress significantly affected the yield attributes of wheat; however, exogenous Se supply was observed to be helpful in improving the drought tolerance potential and yield of water-stressed wheat plants through maintenance of plant water status. A significant increase in wheat yield by Se supply was also noted under normal conditions. The normal plants fertigated with Se maintained the highest values for number of productive tillers, spike length, number of grains per spike, thousand-grain weight, biological and grain yield with no significant difference from Se foliar spray at the tillering stage, which was found to be the most effective method of exogenous Se supply for improving wheat yield under water deficit conditions. Moreover, Se fertigation and foliar spray resulted in the maximum accumulation of Se in shoots and gave the highest net return and cost-benefit ratio under drought stress conditions. The present study is one of the few reports on the role of Se in alleviating water stress for obtaining maximum profit in field grown spring wheat.

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“…Selenium has been recently reported to improve drought resistance in several species, mainly by mitigating the water deficit stress damages in plants (Nejat et al, 2009;Valadabadi et al, 2010;Soleimanzadeli, 2012;Proietti et al, 2013;Emam et al, 2014). The protective role of Se under water stress has been attributed to the protection of cells from oxidative damages (Xue et al, 2001;Prioetti et al, 2013;Habibi, 2013;Ibrahim, 2014), to the regulation of water status of plants (Prioetti et al, 2013;Nawaz et al, 2014), to the increase in root activity (growth and uptake) (Prioetti et al, 2013;Nawaz et al, 2014) and to the prevention of chlorophyll degradation under water stress (Seppanen et al, 2003). In addition, the application of selenium enhanced the antioxidant defence in sorghum (Djanaguiraman et al, 2010) by increasing the antioxidant enzyme activities.…”

Section: Effect Of Water Treatmentmentioning

confidence: 99%

Synergistic Effect of Selenium Addition and Water Stress on <i>Melilotus officinalis</i> L. Mineral Content

Κωστοπούλου

Kyriazopoulos

Abraham

et al. 2015

Not Bot Hort Agrobot Cluj

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The objective of this study was to examine the combined effects of selenium (Se) enrichment and water stress on the accumulation of available macro-and micronutrients in Melilotus officinalis L. aerial parts. Plants of M. officinalis were subjected to three levels of Se addition (0, 1 and 3 mg Se L -1 water) and to two water treatments: a) full irrigation and b) limited irrigation (water stress). The above ground biomass (stems and leaves) was analyzed for Se, potassium (K), sodium (Na), magnesium (Mg), iron (Fe), copper (Cu), calcium (Ca), manganese (Mn) and zinc (Zn). Se addition differentially affected the K, Mg and Ca content of M. officinalis aerial parts, while it led to the reduction of the micronutrients Cu, Fe and Mn. Water stress resulted in the increase of K, Na, Mg, Ca and Cu, and to the decrease of the Fe, Zn and Mn content. An interaction between selenium addition and water treatment was more notable for Ca and Mg, which decreased under water stress at low Se level and for Zn and Cu, which increased under water stress at high Se level. According to our findings, Seinduced increased accumulation of some inorganic ions in the aerial parts of this species under water stress conditions could serve as a means to alleviate the adverse impact of water deficit on important metabolic processes, enhancing M. officinalis tolerance to water stress.

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Selenium (Se) Regulates Seedling Growth in Wheat under Drought Stress

Cited by 58 publications

References 50 publications

Seed priming with KNO₃ mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

Seed priming with KNO₃ mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

Selenium supply methods and time of application influence spring wheat (Triticum aestivum L.) yield under water deficit conditions

Synergistic Effect of Selenium Addition and Water Stress on <i>Melilotus officinalis</i> L. Mineral Content

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Selenium (Se) Regulates Seedling Growth in Wheat under Drought Stress

Cited by 58 publications

References 50 publications

Seed priming with KNO3 mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

Seed priming with KNO3 mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

Selenium supply methods and time of application influence spring wheat (Triticum aestivum L.) yield under water deficit conditions

Synergistic Effect of Selenium Addition and Water Stress on <i>Melilotus officinalis</i> L. Mineral Content

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Seed priming with KNO₃ mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)

Seed priming with KNO₃ mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.)