Germination of the Salt-Tolerant Grass Diplachne fusca. I. Dormancy and Temperature Responses

Morgan, W.C.; Myers, BA

doi:10.1071/bt9890225

Cited by 29 publications

(17 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sporobolus ioclados seed) germinated better at 20:301C regime and any further increases or decreases in temperature inhibited germination at all salinities. Similar sensitivity to change in temperature is also shown by other grasses (Macke & Ungar, 1971;Morgan & Myers, 1989;Myers & Couper, 1989;). Other Arabian Sea coastal grasses like A. lagopoides, H. mucronatum and Urochondra setulosa showed similar responses to change in temperature and highest germination was obtained at 20:301C .…”

Section: Discussionsupporting

confidence: 70%

Germination responses of Sporobolus ioclados: a saline desert grass

Khan

Gulzar

2003

Journal of Arid Environments

123

View full text Add to dashboard Cite

Sporobolus ioclados (Nees ex Trin.) Nees (Poaceae), a halophytic grass distributed in coastal and inland regions of Pakistan, is a potential forage crop which could be grown in the degraded saline soils of the Indus plain and coastal areas. Greatest germination was obtained in non-saline control and it was linearly reduced with increases in salinity to 500 mM NaCl. Variation in temperature substantially affected germination in both the saline and nonsaline treatments. At the optimal temperature regime of 20:301C, S. ioclados seeds showed 93% germination at 0 mM NaCl and 18% germination at 500 mM NaCl, respectively. In all other temperature regimes, only 50% of the seeds germinated in 0 mM while none germinated at 500 mM NaCl. Rate of germination decreased with an increase in salinity at all temperature regimes but comparatively higher rates were obtained at 20:301C. Seeds showed a low recovery response when transferred to distilled water after 20 days of exposure to salinity and tetrazolium viability test showed that most of the ungerminated seeds were dead. The present study showed that if the seed is protected from salinity and temperature stress during storage in the soil, it could germinate during monsoon rains.

show abstract

Section: Discussionsupporting

confidence: 70%

Germination responses of Sporobolus ioclados: a saline desert grass

Khan

Gulzar

2003

Journal of Arid Environments

123

View full text Add to dashboard Cite

show abstract

“…Small microtopographic changes can lead to significant differences in water-table and surface-soil salinities. Seed dimorphism and polymorphism have been reported for a number of halophytic taxa including Arthrocnemum, Atriplex, Chenopodium, Cakile, Salicornia, Salsola, Spergularia, Suaeda and Trianthema (Ungar 1977;Galinato and van der Valk 1986;Mohammad and Sen 1988;Ungar 1988;Morgan and Myers 1989;. The change may enable halophytes to respond to varying salt-marsh or desert environments and could provide multiple opportunities for seedling establishment and survival in the salt environment (Philipupillai and Ungar 1984).…”

Section: Introductionmentioning

confidence: 95%

The effect of plant growth regulators, nitric oxide, nitrate, nitrite and light on the germination of dimorphic seeds of Suaeda salsa under saline conditions

et al. 2005

View full text Add to dashboard Cite

Suaeda salsa, a leaf succulent shrub in the family Chenopodiaceae, is one of the most important halophytes in China. Suaeda salsa produces dimorphic seeds (soft brown seeds and hard black seeds). Seeds of S. salsa were collected from the coastal salt flats near Huanghua City, China. Experiments were conducted to determine the salinity-alleviating effect of plant growth regulators, nitric oxide, nitrate, nitrite and light on the germination of dimorphic seeds of S. salsa. Brown seeds had a higher germination rate than black seeds in all experiments. Black seeds were more sensitive to salt in the absence of light in comparison to brown seeds. Brown seeds absorbed water more quickly in comparison to black seeds and were found to be more tolerant of salt stress. Our results showed that 1-aminocyclopropane-1-carboxylate (ACC, the immediate precursor of ethylene), nitrite, GA(4) and BA improved seed germination in the presence of salt. However, nitrate, GA(1), GA(3) failed to alleviate salt stress. ABA inhibited seed germination and seedling growth. Possible mechanisms involved in the alleviation of salt stress in S. salsa seeds and the ecological adaptation of the seeds to the environment are discussed.

show abstract

“…Genetic polymorphism also exists in distinct populations of the halophyte Suaeda maritima (Boucaud 1962). Seed dimorphism and polymorphism have been reported for a number of halophytic taxa including Arthrocnemum, Atriplex, Chenopodium, Cakile, Salicornia, Salsola, Spergularia, Suaeda and Trianthema (Ungar 1977;Khan and Ungar 1984; Galinato and van der Valk 1986; Mohammad and Sen 1988;Ungar 1988; Morgan and Myers 1989;Khan and Gul 1998) and may have resulted in plasticity in their germination responses to varying environments.…”

Section: Introductionmentioning

confidence: 99%

Germination of dimorphic seeds of Suaeda moquinii under high salinity stress

Khan¹,

Gul²,

Weber³

2001

Aust. J. Bot.

View full text Add to dashboard Cite

Suaeda moquinii (Torrey) Greene (desert blite), a succulent shrub in the family Chenopodiaceae, is widely distributed in salt marshes of the western United States. Suaeda moquinii produces dimorphic seeds (soft brown and hard black). Both types of seeds were collected from a salt marsh in Faust, Utah. Experiments were conducted to determine the seed germination responses of the black and brown seeds to salinity and temperature. Brown seeds were found to be one of the most salt tolerant at the germination stage when compared to other halophytes. Brown seeds germinated (30%) at 1000 mM NaCl, but only a few black seeds germinated (8%) at 600 mM NaCl. Seed germination occurred in most saline treatments at the lowest thermoperiod (5-15°C) tested. In some salinity treatments (600, 800, 1000 mM), further increases in temperature resulted in progressively decreased seed germination. Brown seeds germinated better and had a higher germination rate (germination velocity) than black seeds at all thermoperiods. The highest rate of germination of black seeds occurred at the lowest thermoperiod (5-15°C). Recovery of germination for black seeds when transferred to distilled water after being in various salinity treatments for 20 days was nearly complete (82-100%) at the lowest thermoperiod (5-15°C) but decreased with increase in the temperature. Brown seeds recovered substantially (59-97%) from salinity at all thermoperiods. Regression analyses indicated significant differences between the germination recovery of the black and brown seeds. M . A jm al Kh a n, Bi l qu e es Gu l, Da r re l l J . We be r B T0 00 2 0 G er m i na t i on o f S u ae d a m oq u i ni i se e d u n de r h ig h sa l i nt y M . A. Kh a n e t a l .

show abstract

Germination of the Salt-Tolerant Grass Diplachne fusca. I. Dormancy and Temperature Responses

Cited by 29 publications

References 0 publications

Germination responses of Sporobolus ioclados: a saline desert grass

Germination responses of Sporobolus ioclados: a saline desert grass

The effect of plant growth regulators, nitric oxide, nitrate, nitrite and light on the germination of dimorphic seeds of Suaeda salsa under saline conditions

Germination of dimorphic seeds of Suaeda moquinii under high salinity stress

Contact Info

Product

Resources

About