Participatory Evaluation of Drought Tolerant Maize Varieties using Mother-Baby Trial Model: A Case Study in the Forest-Savannah Transition Zone of Ghana

Activities of science and technology for innovation and creativity campus aims are: (1) thecommercialization of science and technology campus creativity as a source of financing for the developmentof institutions; (2) stimulate the entrepreneurial spirit among beings campus, and (3) help people get seeds ofdrought-tolerant maize varieties. Methods of execution include the business aspects of the planned businessactivities consist of: provision of raw materials, production processes, management, marketing, humanresources, facilities, and financial. The raw material is obtained from units of science and technology fornovation and creativity campus and through partnerships with farmers' seed corn. The production processstarted from seed, sorting, and packaging. Marketing is done directly, partnerships with local governmentsand konsiniasi with kiosk / farm shop. Results show that the activities of science and technology unit forinnovation and creativity campus drought-tolerant maize seed has gone well characterized by supportinfrastructure adequate maize seed production; IbIKK unit operates under the management of PSAgroecotechnology Faculty of Agriculture, University of Udayana; Of investment made in 2014 amountingto Rp. 39,550,000; Result of sales corn seeds turnover in 2014 amounted to 400 kg (Rp. 12 million); and netcash flow amounted to 17,672,400.

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Brittle–ductile transition zone case study (Zagros–Iran)

Journal of Asian Earth Sciences ◽

10.1016/j.jseaes.2012.07.011 ◽

2012 ◽

Vol 59 ◽

pp. 156-166 ◽

Cited By ~ 2

Author(s):

Hamid Reza Nankali

Keyword(s):

Transition Zone ◽

Brittle Ductile Transition

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Evaluation of saline-alkali and drought tolerance in maize varieties

Bangladesh Journal of Botany ◽

10.3329/bjb.v48i4.49053 ◽

2019 ◽

Vol 48 (4) ◽

pp. 1047-1063

Author(s):

Huili Zhang ◽

Chuang Yuan ◽

Guillian Mao ◽

Xue Gao ◽

Liu Zhu ◽

...

Keyword(s):

Cluster Analysis ◽

Drought Stress ◽

Drought Tolerance ◽

Growth And Development ◽

Stress Condition ◽

Stress Factors ◽

Alkali Stress ◽

Yield Attributes ◽

Drought Tolerant ◽

Maize Varieties

Saline-alkali and drought stresses are one of the abiotic stress factors that limit the normal growth and development of plants. In this work, various agronomic indexes including growth physiology and yield attributes were studied under saline-alkali and drought stress treatments. It was found that the limit of plant growth and development caused by drought stress is much higher than that of saline-alkali stress (p < 0.01). Based on the comprehensive evaluation value (D value), under saline-alkali stress condition, 36 maize varieties could be divided into four groups by cluster analysis (CA): High saline-alkali tolerance (3 varieties), medium saline-alkali tolerant(10 varieties), saline-alkali sensitive (19 varieties), high saline-alkali sensitive (4 varieties). In drought stress condition, 36 maize varieties could be divided into five groups by cluster analysis (CA): High drought-tolerance (2 varieties), medium drought-tolerant (14 varieties), low drought-tolerant (15 varieties), drought-sensitive (4 varieties), high drought-sensitive (1 variety). Therefore, this study provides a comprehensive screening of maize varieties under saline-alkali and drought stresses.

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Lipid Peroxidation and Chlorophyll Fluorescence of Photosystem II Performance during Drought and Heat Stress is Associated with the Antioxidant Capacities of C3 Sunflower and C4 Maize Varieties

International Journal of Molecular Sciences ◽

10.3390/ijms21144846 ◽

2020 ◽

Vol 21 (14) ◽

pp. 4846

Author(s):

Dilek Killi ◽

Antonio Raschi ◽

Filippo Bussotti

Keyword(s):

Lipid Peroxidation ◽

Antioxidant Activity ◽

Heat Stress ◽

Chlorophyll Fluorescence ◽

Photosystem Ii ◽

Membrane Damage ◽

Drought Tolerant ◽

Maize Varieties ◽

Catalase Peroxidase ◽

Drought And Heat Stress

Agricultural production is predicted to be adversely affected by an increase in drought and heatwaves. Drought and heat damage cellular membranes, such as the thylakoid membranes where photosystem II occurs (PSII). We investigated the chlorophyll fluorescence (ChlF) of PSII, photosynthetic pigments, membrane damage, and the activity of protective antioxidants in drought-tolerant and -sensitive varieties of C3 sunflower and C4 maize grown at 20/25 and 30/35 °C. Drought-tolerant varieties retained PSII electron transport at lower levels of water availability at both temperatures. Drought and heat stress, in combination and isolation, had a more pronounced effect on the ChlF of the C3 species. For phenotyping, the maximum fluorescence was the most effective ChlF measure in characterizing varietal variation in the response of both species to drought and heat. The drought-tolerant sunflower and maize showed lower lipid peroxidation under drought and heat stress. The greater retention of PSII function in the drought-tolerant sunflower and maize at higher temperatures was associated with an increase in the activities of antioxidants (glutathione reductase, superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase), whereas antioxidant activity declined in the drought-sensitive varieties. Antioxidant activity should play a key role in the development of drought- and heat-tolerant crops for future food security.

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Can bomb-peak tritium persist in the transition zone? A case study from the German island of Langeoog

E3S Web of Conferences ◽

10.1051/e3sconf/20185400022 ◽

2018 ◽

Vol 54 ◽

pp. 00022

Author(s):

V.E.A. Post ◽

G.J. Houben

Keyword(s):

Transition Zone ◽

Southern Hemisphere ◽

Northern Hemisphere ◽

Half Life ◽

Tritium Concentration ◽

Nuclear Bomb ◽

Hydrogeological Studies

Tritium has been used as a tracer in hydrogeological studies to date young groundwater. It was released in massive amounts to the atmosphere by nuclear bomb testing in the 1950’s and early 1960’s. Its activity in the atmosphere peaked around 1963-1964 and has been steadily falling since then due to its half-life of 12.32 years. On the northern hemisphere, where the atmospheric tritium concentration reached much higher levels than on the southern hemisphere, elevated tritium activities in groundwater persist, and thus can still be used to identify groundwater that has recharged during the post-bomb era.

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