EFFECT OF WATER STRESS AND CONTAMINATED WATER ON SEED GERMINATION TRAITS AND EARLY GROWTH IN MAIZE (Zea mays)

2018 ◽  
Vol 17 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Hassan Heidari ◽  
Danial Kahrizi
Keyword(s):  
Zea Mays ◽  
Water Stress ◽  
Seed Germination ◽  
Early Growth ◽  
Contaminated Water ◽  
Effect Of Water ◽  
Germination Traits

scholarly journals Effect of Irrigation with Contaminated Water by Cloth Detergent on Seed Germination Traits and Early Growth of Sunflower (Helianthus annuus L.)

2013 ◽  
Vol 5 (1) ◽  
pp. 86-89 ◽  
Author(s):  
Hassan HEIDARI
Keyword(s):  
Seed Germination ◽  
Helianthus Annuus ◽  
Early Growth ◽  
Seed Vigor ◽  
Contaminated Water ◽  
Total Biomass ◽  
High Concentration ◽  
Helianthus Annuus L ◽  
Household Cleaning Products ◽  
Germination Traits

One of the sources for irrigation is sewage. Contaminated water may affect seed germination and plant growth. A laboratory experiment and a pot experiment were conducted in 2012 to determine the effect of different doses of detergent on seed germination traits and early growth of sunflower (Helianthus annuus L.). The experiments included eight doses of cloth detergent (0, 0.00002, 0.0002, 0.002, 0.02, 0.2, 2, 20 g/L). Results showed that 20 and 2 g/L of detergent severely reduced seed germination, plant height, leaf number per plant, total biomass and stem weight. 20 g/L of detergent reduced shoot length, root length, seedling weight and seed vigor. Seed germination stage was more sensitive to contaminated water than early growth stage. The results demonstrated that irrigating sunflower by contaminated water with household cleaning products at high concentration should be avoided.

Effect of Water Stress on Seed Germination and Seedling Growth of Rice (Oryza sativa L.) Genotypes

2003 ◽  
Vol 2 (4) ◽  
pp. 217-222 ◽  
Author(s):  
H. Pirdashti ◽  
Z. Tahmasebi Sarvestani ◽  
GH. Nematzadeh ◽  
A. Ismail
Keyword(s):  
Oryza Sativa ◽  
Water Stress ◽  
Seed Germination ◽  
Seedling Growth ◽  
Oryza Sativa L ◽  
Effect Of Water

scholarly journals Water stress in germination, growth and development of coffee cultivars

2018 ◽  
Vol 40 (1) ◽  
pp. 82-89 ◽  
Author(s):  
Julieta Andréa Silva de Almeida ◽  
Mary Túlia Vargas Lobato Guedes de Azevedo ◽  
Marcus Vinicius Salomon ◽  
Priscila Fratin Medina
Keyword(s):  
Polyethylene Glycol ◽  
Water Stress ◽  
Seed Germination ◽  
Growth And Development ◽  
Coffea Arabica ◽  
Primary Root ◽  
Control Treatment ◽  
Effect Of Water ◽  
Reduced Height ◽  
Polyethylene Glycol 6000

Abstract: The aim of this study was to evaluate the effect of water stress on the germination of Coffea arabica seeds and the growth and development of plants from these seeds. Seeds of the cultivars Bourbon Vermelho, Mundo Novo, and BA-10 were placed to germinate in the dark at 30 ºC in the presence and absence of 100 g/L of polyethylene glycol 6000. The water stress applied delayed the beginning of seed germination by seven days in relation to seeds of the control, which had achieved responses of up to 50%, but there were no differences between the treatments at the end of the experiment. Furthermore, the length of the primary root in seeds germinated under water stress was less than in the control treatment, especially for the cultivar Mundo Novo. Plants of the cultivars Bourbon Vermelho and Mundo Novo developed from seeds previously germinated under water stress exhibited reduced height and fewer leaf pairs than those from the control, whereas ‘BA-10’ responded in a similar way in both treatments. Thus, the cultivars Bourbon Vermelho and Mundo Novo were more sensitive to the water stress applied in the germination phase than ‘BA-10’.

Over-expression of the Zea mays phytoglobin (ZmPgb1.1) alleviates the effect of water stress through shoot-specific mechanisms

2020 ◽  
Vol 155 ◽  
pp. 384-395
Author(s):  
Cassandra Hammond ◽  
Mohamed M. Mira ◽  
Belay T. Ayele ◽  
Sylvie Renault ◽  
Robert D. Hill ◽  
...  
Keyword(s):  
Zea Mays ◽  
Water Stress ◽  
Over Expression ◽  
Effect Of Water

Effect of Water Stress on Seed Germination of Thymus serpyllum L. from Tessala mount

2015 ◽  
Vol 10 (4) ◽  
pp. 151-158 ◽  
Author(s):  
Mohammed Dadach ◽  
Zoheir Mehdadi ◽  
Ali Latreche
Keyword(s):  
Water Stress ◽  
Seed Germination ◽  
Effect Of Water ◽  
Thymus Serpyllum

scholarly journals The risk-takers and -avoiders: germination sensitivity to water stress in an arid zone with unpredictable rainfall

AoB Plants ◽  
2019 ◽  
Vol 11 (6) ◽  
Author(s):  
Corrine Duncan ◽  
Nick L Schultz ◽  
Megan K Good ◽  
Wolfgang Lewandrowski ◽  
Simon Cook
Keyword(s):  
Water Stress ◽  
Seed Germination ◽  
Water Potential ◽  
Water Availability ◽  
Cold Climate ◽  
Arid Zones ◽  
Water Potentials ◽  
Risk Takers ◽  
Hydrotime Model ◽  
Germination Traits

Abstract Water availability is a critical driver of population dynamics in arid zones, and plant recruitment is typically episodic in response to rainfall. Understanding species’ germination thresholds is key for conservation and restoration initiatives. Thus, we investigated the role of water availability in the germination traits of keystone species in an arid ecosystem with stochastic rainfall. We measured seed germination responses of five arid species, along gradients of temperature and water potential under controlled laboratory conditions. We then identified the cardinal temperatures and base water potentials for seed germination, and applied the hydrotime model to assess germination responses to water stress. Optimum temperatures for germination ranged from 15 to 31 °C under saturated conditions (0 MPa), and three species had low minimum temperatures for germination (<3 °C). A small proportion of seeds of all species germinated under dry conditions (Ψ ≤ −1 MPa), although base water potential for germination (Ψ b50) ranged from −0.61 to −0.79 MPa. Species adhered to one of two germination traits: (i) the risk-takers which require less moisture availability for germination, and which can germinate over a wider range of temperatures irrespective of water availability (Casuarina pauper and Maireana pyramidata), and (ii) the risk-avoiders which have greater moisture requirements, a preference for cold climate germination, and narrower temperature ranges for germination when water availability is low (Atriplex rhagodioides, Maireana sedifolia and Hakea leucoptera). High seed longevity under physiological stress in H. leucoptera, combined with a risk-avoiding strategy, allows bet-hedging. The hydrotime model predicted lower base water potentials for germination than observed by the data, further supporting our assertion that these species have particular adaptations to avoid germination during drought. This study provides insights into the complex physiological responses of seeds to environmental stress, and relates seed germination traits to community dynamics and restoration in arid zones.

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