Salinity effect on bioelectric activity, growth, Na+ accumulation and chlorophyll fluorescence of maize leaves: a comparative survey and prospects for screening

Shabala, Sergey; Shabala, Svetlana I.; Martynenko, Alex; Babourina, Olga; Newman, Ian

doi:10.1071/pp97146

Cited by 153 publications

(81 citation statements)

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“…Total chlorophylls and carotenoids content were calculated from cotyledons, according to Shabala et al (1998) and results were expressed as µg g -1 FW. Proline was extracted with toluene, according to Bates et al (1973), and absorbance was read at 520 nm by a spectrophotometer (T60 UV/VIS, Oasis Scientific Inc., Taylors, SC).…”

Section: Fourmentioning

confidence: 99%

Response of Sesame Seedlings to Different Concentrations of Humic Acids or Calcium Nitrate at Germination and Early Growth

Souguir¹,

Chérif²

2017

Cercetari Agronomice in Moldova

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ABSTRACT. This study was conducted in order to evaluate the response of sesame seeds (Sesamum indicum L.) to organic or mineral fertilization. The effects of two fertilizers, which were calcium nitrate and humic acids were studied separately at germination and early seedlings growth. Different concentrations of humic acids (HA 0 : 0, HA 1 : 500, HA 2 : 1000 and HA 3 : 2000 mg L -1 ) or calcium nitrate (CaN 0 : 0, CaN 1 : 50, CaN 2 : 100 and CaN 3 : 200 mg L -1 ) were applied distinctly to the growth media. The experimental design was accomplished in a completely randomized block design with three replications. Germination measurements, seedlings length, fresh seedling weight, total chlorophylls and carotenoids, total soluble proteins and sugars were determined. Results showed that humic acids applied at 1000 mg L -1 or calcium nitrate applied at 100 mg L -1 reduced the mean germination time (3.5 and 3.61 days) and had the highest germination index (GI) and the highest coefficient of velocity (CV). The longest seedling was obtained at the concentrations HA 2 and CaN 2 (+22%). Total chlorophyll and carotenoids were significantly higher in seedlings receiving the HA 2 and CaN 2 and these treatments increased total soluble proteins content by 32%. Higher concentrations of humic acids or calcium nitrate HA 3 and CaN 3 delayed germination and enhanced proline and total soluble sugars, respectively, by 42% and 46%, compared to control. These preliminary results indicated that the use of fertilizers should be optimized and they can be transformed at high level to an abiotic stress menacing plant productivity. On the other hand, suitable concentrations of fertilizers can be used in the future as a remedy to improve growth under abiotic stress.

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Section: Fourmentioning

confidence: 99%

Response of Sesame Seedlings to Different Concentrations of Humic Acids or Calcium Nitrate at Germination and Early Growth

Souguir¹,

Chérif²

2017

Cercetari Agronomice in Moldova

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“…Chlorophyll a (Chl a ), chlorophyll b (Chl b ) and total chlorophyll (TC) content, were analyzed following the methods of Shabala et al (1998) and total carotenoid (C x+c ) concentrations were assayed according to Lichtenthaler (1987). One hundred milligrams of leaf material was collected and placed in a 25 mL glass vial along with 10 mL 95.5 % acetone, and blended using a homogenizer.…”

Section: Methodsmentioning

confidence: 99%

Water-deficit tolerant classification in mutant lines of indica rice

Cha–um

Yooyongwech

Supaibulwatana

2012

Sci. agric. (Piracicaba, Braz.)

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Water shortage is a major abiotic stress for crop production worldwide, limiting the productivity of crop species, especially in dry-land agricultural areas. this investigation aimed to classify the water-deficit tolerance in mutant rice (Oryza sativa L. spp. indica) genotypes during the reproductive stage. Proline content in the flag leaf of mutant lines increased when plants were subjected to water deficit. relative water content (rWC) in the flag leaf of different mutant lines dropped in relation to water deficit stress. A decrease rWC was positively related to chlorophyll a degradation. Chlorophyll a , chlorophyll b , total chlorophyll , total carotenoids , maximum quantum yield of PSII , stomatal conductance , transpiration rate and water use efficiency in mutant lines grown under water deficit conditions declined in comparison to the well-watered, leading to a reduction in net-photosynthetic rate. In addition, when exposed to water deficit, panicle traits, including panicle length and fertile grains were dropped. the biochemical and physiological data were subjected to classify the water deficit tolerance. NSG19 (positive control) and DD14 were identified as water deficit tolerant, and AA11, AA12, AA16, bb13, bb16, CC12, CC15, EE12, FF15, FF17, G11 and Ir20 (negative control) as water deficit sensitive, using Ward's method.

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“…On one hand, NaCl presence in soil solution affects crop water relations, which becomes in an osmotic stress for maize plants (Cramer et al 1994;Hasegawa et al 2000). And on the other hand, shoot Na + concentration in maize increases with NaCl increments in soil solution, which involves ionic balance alterations (Shabala et al 1998). …”

Section: * Corresponding Authormentioning

confidence: 99%

NaCl effects in Zea mays L. x Tripsacum dactyloides (L.) L. hybrid calli and plants

Pesqueira¹,

García²,

Staltari³

et al. 2006

Electron. J. Biotechnol.

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High salt concentrations in soils negatively affect maize growth. Techniques such as remote hybridization and in vitro selection have been extensively used to accelerate breeding processes. In order to determine the usefulness of Tripsacum to improve salt tolerance in maize, the effects of NaCl, in vitro and in vivo, were evaluated in an intergeneric hybrid (MT) obtained from crossing Zea mays with Tripsacum dactyloides. Organogenic calli, induced from immature MT hybrid embryos, were exposed to different NaCl concentrations and the survival and regeneration percentages were calculated. Plants of the MT hybrid, obtained from the organogenic calli, were exposed to NaCl concentrations considered harmful for maize. The shoot dry weights of plants exposed to 250 mM NaCl did not show significant differences respect to the control ones. Although sodium content in shoots was incremented 2,5 fold, it was not toxic for this material. The MT hybrid showed better behavior, in vitro and in vivo, that maize genotypes exposed to similar conditions.High salt concentrations in soils negatively affect maize growth and, consequently, produce a large drop in yield (Pasternak et al. 1995). In many countries of the world soil salinity is a serious problem for agriculture and,

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Salinity effect on bioelectric activity, growth, Na+ accumulation and chlorophyll fluorescence of maize leaves: a comparative survey and prospects for screening

Cited by 153 publications

References 0 publications

Response of Sesame Seedlings to Different Concentrations of Humic Acids or Calcium Nitrate at Germination and Early Growth

Response of Sesame Seedlings to Different Concentrations of Humic Acids or Calcium Nitrate at Germination and Early Growth

Water-deficit tolerant classification in mutant lines of indica rice

NaCl effects in Zea mays L. x Tripsacum dactyloides (L.) L. hybrid calli and plants

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