Germination responses of Sporobolus ioclados: a saline desert grass

Khan, M. Ajmal; Gulzar, Salman

doi:10.1006/jare.2002.1045

Cited by 124 publications

(95 citation statements)

References 16 publications

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“…These results indicate that L. spartum is a moderately salt-tolerant grass at germination stage in comparison with other grasses found at the steppes of Algeria. Similar results were reported for other grasses: Briza maxima [21], Triglochin maritima [18], Aeluropus lagopoides [10], and Sporobolus ioclados [19].…”

Section: Discussionsupporting

confidence: 77%

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Effect of Salinity and Temperature on Germination of Lygeum spartum

Nedjimi

2013

Agric Res

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Lygeum spartum L. (Poaceae) is one of the most important perennial grass species in arid steppes of Algeria. Its germination responses to environmental stresses are poorly understood. Therefore, experiments were conducted to determine the effect of salinity and temperature on the germination of seeds. Seeds were germinated at three alternating temperatures (10-20, 15-25, and 20-30°C), with four NaCl concentrations (0, 50, 100, and 150 mM) and 12-h photoperiod. Results indicate that seeds can germinate at high salt concentrations (150 mM NaCl). However, highest germination was obtained in distilled water. Lower thermoperiods promoted germination, while high temperatures significantly inhibited the germination of seeds at all NaCl concentrations tested. Rate of germination decreased with increases in salinity. Seeds recovered after being transferred to distilled water, and recovery was higher from higher salinity concentrations and lower thermoperiods. L. spartum is moderately salt tolerant at germination stage, and tolerance is affected by the interaction of temperature and NaCl concentration.

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Section: Discussionsupporting

confidence: 77%

“…Dormancy reduces the risk of seedling mortality, when moisture is limited and salinity is increased. This is quite favorable under hypersaline conditions [19].…”

Section: Discussionmentioning

confidence: 97%

Effect of Salinity and Temperature on Germination of Lygeum spartum

Nedjimi

2013

Agric Res

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“…Although high salinity may inhibit germination, this effect may itself depend upon the prevailing temperature at the germination stage (Rivers and Weber, 1971;Badger and Ungar, 1989). Since that, tolerance to salinity during germination is crucial for the establishment of plants growing in saline soil of arid regions (Ungar, 1995;Khan and Gulzar, 2003). Meyer and Allen (1999), affirm that seed germination and emergence depend on factors associated with genotype, maturation environment, post-maturation history and germination environment.…”

Section: Introductionmentioning

confidence: 99%

Germination and emergence variability of alfalfa (Medicago sativa L.) landraces collected in Southern Tunisia oases

Benabderrahim

Haddad

Hamza

et al. 1970

Span. j. agric. res.

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Alfalfa (Medicago sativa L.) is one of the most important forage crops in the world. It has been originated from the Caucasus region (Michaud et al., 1988). The species presents purple flowers, a tap root, an erect growth habit, coiled pods and no winter dormancy. This plant improves the yield and quality of the following crops by atmospheric nitrogen fixation (Bruulsema and Christie, 1987 AbstractVariability in germination under controlled conditions with and without salt, seeds characteristics and field emergence were evaluated for 20 landraces of Medicago sativa ssp sativa, a forage legume collected from three sites in Tunisia. Highly significant differences were recorded among the landraces (p < 0.001) for all the characters studied except tegument colour. Number of seeds produced per plant ranged between 378 and 460 seeds g -1 . Emergence responses of seeds were different among landraces and sites and their values ranged between 12 to 45%. Salt stress (150 mM) caused substantial reduction in final and rate of germination of all the landraces with an average decline of 62.4 and 69.7%, respectively. Final germination values ranged from 26.5 to 75.75% when supplied distilled water. However, final germination values ranged from 10.75 to 32.5% when the seeds were exposed to saline water (150 mM). Rate of germination ranged from 12.75 to 63.25% and from 6.25 to 21.25% at non-saline and salt stress, respectively. Cluster analysis separated the 20 landraces into four clusters. Three landraces in the first cluster had the lowest germination and the greatest field emergence. One landrace composed the second cluster and showed both high germination and field emergence. Two landraces in the third cluster presented greater germination and low emergence. The other landraces constituted the fourth cluster and had intermediates emergence and germination.Additional key words: arid land; diversity; salt stress; seeds. Resumen Variabilidad en la germinación y en la emergencia de variedades autóctonas de Medicago sativa en diferentes oasis de TúnezSe evaluó la germinación en laboratorio con y sin estrés salino, así como las características de las semillas y la emergencia de 20 poblaciones de la leguminosa forrajera Medicago sativa ssp sativa, procedentes de tres localidades de Túnez. Se observaron diferencias altamente significativas entre las poblaciones (p < 0,001) en todos los caracteres estudiados excepto en el color del tegumento. El número de semillas por gramo varió entre 378 y 460. La emergencia de las semillas fue diferente entre las poblaciones y las localidades (variaron entre el 12 y el 45%). El estrés salino (150 mM) causó una fuerte reducción en todas las poblaciones, tanto en la germinación final como en el porcentaje de germinación, con una reducción media del 62,4 y 69,7%, respectivamente. Los valores de germinación finales variaron entre 26,5 y 75,75% y entre 10,75 y 32,5% con agua destilada y estrés salino, respectivamente. El porcentaje de germinación varió desde el 12,75 al 63,25% y del 6,25 al 21,25% en ...

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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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Germination responses of Sporobolus ioclados: a saline desert grass

Cited by 124 publications

References 16 publications

Effect of Salinity and Temperature on Germination of Lygeum spartum

Effect of Salinity and Temperature on Germination of Lygeum spartum

Germination and emergence variability of alfalfa (Medicago sativa L.) landraces collected in Southern Tunisia oases

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

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