Drought, salinity and heat differently affect seed germination of<i>Pinus pinea</i>

Sidari, Maria; Mallamaci, Carmelo; Muscolo, Adele

doi:10.1007/s10310-008-0086-4

Cited by 62 publications

(35 citation statements)

References 27 publications

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“…Water stress not only affects seed germination but also increases mean germination time in maize plants (Willanborb et al, 2004). The adverse effect of water shortage on germination and seedling growth has been well reported in different crops (Mostafavi et al, 2011;Khodarahmpour, 2011).The polyethylene glycol (PEG)-induced inhibition of germination has been attributed to osmotic stress (Dodd and Donovan, 1999;Sidari et al, 2008).…”

Section: Issn: 2319-7706 Volume 6 Number 5 (2017) Pp 1095-1104mentioning

confidence: 99%

Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

Partheeban¹,

Chandrasekhar²,

Jeyakumar³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Section: Issn: 2319-7706 Volume 6 Number 5 (2017) Pp 1095-1104mentioning

confidence: 99%

Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

Partheeban¹,

Chandrasekhar²,

Jeyakumar³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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“…The PEG-induced inhibition of germination has been attributed to osmotic stress (Dodd and Donovan, 1999;Sidari et al, 2008). Temperature plays a crucial role in many biological and physiological processes of plants (Al-Ahmadi and Kafi, 2007;Berti and Johnson, 2008).…”

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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“…This was because the higher osmotic pressure used, the more concentrated solution and more water binding, so the seeds were difficult to absorb water that willbe used in metabolic processes that causeyield decrease and germination rate increase This was consistent with the statement of Verslues et al (2006) suggesting that the more concentrated PEG concentrations the more sub ethylene subunits bind the water, the more difficult it is to absorb water the plants cause drought stress. PEG induces germination inhibition because it is associated with osmotic stress (Sidari et al, 2008). Meanwhile, according to La Ode Afa, et al (2012) PEG dissolved in water causes water molecules (H2O) will be attracted to oxygen atoms in subunitethylene oxide through hydrogen bonds so the water potential decreases.…”

Section: Discussionmentioning

confidence: 99%

Drought Tolerance Test of Three Gogo Rice Cultivars Using Peg Atgermination Phase

Mustakim¹,

Maemunah²,

Adrianton³

2018

Agroland: The Agr. Sci. J.

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Data in 2012 explained that Indonesia had dry land about 148 million ha (78%) and wetland by 40.20 million ha (22%) out of 188.20 million ha of the total land area. The variety of rice which can grow and produce well on marginal land such as gogo rice is very indispensable. This research aimed to find the gogo rice cultivars that can germinate normally in particular osmotic pressure and the tolerance limit on the drought by using PEG 6000 solution. The research was prepared with two-factor factorial design by using Completely Randomized Design. The first factor consisted of three gogo rice cultivars, namely 1. siang, 2. Pulut ko, and 3. roda, while the second factor consisted of four treatments, namely 1. water as control of 2. -1 bar, 3. -2 bar, and 4. -3 bar.Thus, there were 12 combinations of treatment in which each treatment was repeated four times. In the experiment Rolled Paper placed in plastic test method was used in which there were 50 items in each experiment unit.The variable observed was potential for growth, percentage of germination, and germination rate. The research findings reveal that the three cultivars were able to germinate normally only up to -1 bar osmotic pressure, while the pulut cultivar had higher germination capacity compared with siang and roda cultivars up to -3 bar PEG 6000 osmotic pressure. Siang cultivar and -1 bar osmotic pressure gave potential for growth, germination capacity, and germination rate.

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Drought, salinity and heat differently affect seed germination ofPinus pinea

Cited by 62 publications

References 27 publications

Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

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

Drought Tolerance Test of Three Gogo Rice Cultivars Using Peg Atgermination Phase

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