Salinity effects on the early development stages of <i>Panicum coloratum</i>: cultivar differences

Taleisnik, Edith; Perez, Joan; (Argentina)), Cordoba; Moreno,; Seffino, L. García; Arias,; Grunberg, Karina; Bravo,; Zenoff,

doi:10.1046/j.1365-2494.1998.00139.x

Cited by 27 publications

(10 citation statements)

References 23 publications

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“…Bambatsi has been mentioned as more salt tolerant than several tropical pasture legumes (Keating et al ., ), a comparison of salt tolerance between cultivars Klein and Bambatsi showed that cv. Klein accumulated more dry matter than Bambatsi in a saline field (Taleisnik et al ., ) and was also more salt tolerant in greenhouse experiments. Cultivar Klein was, therefore, considered suitable material for further investigation of variability in salt tolerance in this species.…”

Section: Introductionmentioning

confidence: 90%

Salt tolerance variability among stress‐selected Panicum coloratum cv. Klein plants

Pittaro

Andreu

Bruno

et al. 2015

Grass and Forage Science

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This work assessed intracultivar variability for salt tolerance within Panicum coloratum cv. Klein, explored some physiological parameters potentially associated with it and evaluated the contribution of cell division and expansion to the decreased leaf length observed under salinity. Individual plants that had survived severe stress environments in an established pasture were collected and clonal families were obtained by vegetative propagation. These were evaluated in a greenhouse, in pots with an inert substrate irrigated with nutrient solution containing 0, 200 or 400 mm NaCl. Salt tolerance was assessed from growth variables expressed as a percentage of non‐salinized controls. Changes induced by salinity in carbon fixation, soluble sugars and compatible solutes were also measured. The selected plants showed 33% higher salt tolerance than plants from the same cultivar obtained from seeds, and variability for salt tolerance was detected within the group, suggesting these plants could be valuable germplasm for breeding programmes for saline areas. All selected plants accumulated low leaf blade Na concentrations (< 0·1 mm g−1 dry weight on average), and K concentrations tended to remain high under salinity. A kinematic analysis indicated a reduction in the number of cells in the division‐only zone was the main cause of shorter leaves under stress. Although plants showed some differences in all these traits, they were not related to salt‐tolerance variability within this group of stress‐tolerant plants.

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Section: Introductionmentioning

confidence: 90%

Salt tolerance variability among stress‐selected Panicum coloratum cv. Klein plants

Pittaro

Andreu

Bruno

et al. 2015

Grass and Forage Science

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“…Seed germination and early seedling growth are critical stages for the establishment of plant populations under saline conditions (Perez et al, 1998;Khan and Gulzar, 2003). Grasses differ in their upper limit of salinity tolerance and an increase in salinity concentration usually delays and reduces seed germination (Gulzar et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Comparative Effects of Drought and Salt Stress on Germination and Seedling Growth of <i>Pennisetum divisum</i> (Gmel.) Henr.

Al-Taisan¹

2010

American Journal of Applied Sciences

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Problem statement: Water stress due to drought and salinity is probably the most significant abiotic factor limiting plant and also crop growth and development. Salinity and drought stresses are physiologically related, because both induce osmotic stress and most of the metabolic responses of the affected plants are similar to some extent. Water deficit affects the germination of seed and the growth of seedlings negatively. Temperature is an exceedingly important factor in seed germination. It directly affects whether a plant can sprout and, if so, how long it will take to emerge from the ground. Approach: The objective of this investigation was to determine the effect of four alternating temperature regime, drought and salt stress on germination characteristics of Pennisetum divisum. Seeds were germinated at four alternating temperatures (10/20, 15/25, 20/35 and 25/40°C at 12 h light). Seeds were also germinated with the iso-osmotic concentrations of sodium chloride (NaCl) or in polyethylene glycol PEG8000 (0, -0.2, -0.4, -0.6 and -0.8 MPa) for 14 days. Concentrations were applied to determine their effects on seed germination and seedling growth under laboratory conditions. The effects of different osmotic concentrations of NaCl and PEG were compared to distilled water (control). Results: Optimum germination was attained at 15/25°C which corresponds to temperatures prevailing during spring time. The highest values of germination parameters were obtained with no osmotic potential (0 MPa) under 15/25°C. The final germination percentage and rate of germination in the Pennisetum divisum treated seeds were decreased with the increase of the osmotic potential. At treatment by PEG, the germination was severely decreased at -0.6 MPa. While, no germination occurred at-0.8 MPa by NaCl. The results of the effects of the different osmotic potential of NaCl and PEG on the Radicle Length (RL) and the Hypocotyl Length (HL) mm of the tested P. divisum seeds were retarded when compared to the control. Conclusion: Results indicated germination sensitive to both the stresses. However, seedling growth was more sensitive to NaCl than was germination. However, seedling growth was more sensitive to NaCl than was germination responses to water stress induced by PEG and NaCl. Results also indicated that seed germination of P. divisum is less sensitive to osmotic potential indicating that the seeds of the species are efficient in osmotically adjusting to soluble salts. This suggests the possibility of revegtating moderately salt affected soils.

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“…In the others drought and frosts that occurred between March and August may have been responsible for the significant decrease in the number of surviving plants. These factors could have been more important than salinity in determining the number of surviving plants, as observed for Panicum coloratum plots established in the same area ( Taleisnik et al ., 1998 ).…”

Section: Discussionmentioning

confidence: 83%

“…Field experiments were set up in the province of Santiago del Estero, Argentina, as described by Taleisnik et al . (1998 ).…”

Section: Methodsmentioning

confidence: 99%

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Chloris gayana cultivars: RAPD polymorphism and field performance under salinity

Perez

Bravo

Ongaro

et al. 1999

Grass and Forage Science

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Variability in the response to salinity within Chloris gayana (Rhodes grass) germplasm was evaluated under field conditions, and random amplified polymorphic DNA (RAPD) markers were used to assess genetic relatedness among cultivars/accessions. RAPD analysis showed a clustering of cultivars of known relatedness: cv. Pioneer and accessions Local and Trancas (derived from an old Pioneer pasture established in saline soil) belonged to the same cluster, Katambora to another and tetraploid Boma and Callide could be further separated, Boma belonging to a fourth, distant cluster. Field experiments were laid out in two types of plots: control [with electrical conductivity of the saturation extract (EC) = 3·64 dS m−1] and saline (EC=13·10 dS m−1) and two experiments were carried out: one to evaluate the effects of salinity on emergence and establishment, and the other, with a uniform number of plants per plot, to evaluate yield under saline conditions. All cultivars/accessions had salinity‐associated decreases in dry‐matter (DM) production during the establishment phase. After this stage, 1‐year DM yield was similar in all cultivars within each salinity level and production in the saline plots was significantly lower than in controls only in cv. Callide and accession Trancas. Second‐year production in the non‐saline plots increased by 30% on average over the previous year, whereas an average 40% reduction was observed in the saline plots. Thus, salinity had a negative effect on Rhodes grass establishment and persistence. The cultivars could not be ranked unequivocally by production under saline conditions, but tetraploids Boma and Callide may be said to be less tolerant than the rest on the basis of an increased proportion of dead leaves and decreased number of stolons observed in the saline plot.

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Salinity effects on the early development stages of Panicum coloratum: cultivar differences

Cited by 27 publications

References 23 publications

Salt tolerance variability among stress‐selected Panicum coloratum cv. Klein plants

Salt tolerance variability among stress‐selected Panicum coloratum cv. Klein plants

Comparative Effects of Drought and Salt Stress on Germination and Seedling Growth of <i>Pennisetum divisum</i> (Gmel.) Henr.

Chloris gayana cultivars: RAPD polymorphism and field performance under salinity

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