Chloroplast Structure after Water Shortage and High Temperature in Two Lines of Zea mays L. that Differ in Drought Resistance

1991 ◽  
Vol 152 (2) ◽  
pp. 186-194 ◽  
Author(s):  
Zoran Ristic ◽  
David D. Cass
Keyword(s):  
Zea Mays ◽  
High Temperature ◽  
Drought Resistance ◽  
Zea Mays L ◽  
Water Shortage ◽  
Chloroplast Structure

PHOTOPERIOD AND TEMPERATURE EFFECTS ON CORN

1974 ◽  
Vol 54 (1) ◽  
pp. 71-78 ◽  
Author(s):  
R. B. HUNTER ◽  
L. A. HUNT ◽  
L. W. KANNENBERG
Keyword(s):  
Zea Mays ◽  
High Temperature ◽  
Vegetative Growth ◽  
Temperature Effects ◽  
Growth And Development ◽  
Zea Mays L ◽  
Dry Weight ◽  
Stem Length

The open-pollinated corn (Zea mays L.) cult Gaspé Flint and three hybrids, Guelph GX122, Harrow 691, and Pioneer X306, were selected to examine the effects of photoperiod and temperature on the number of days to tassel initiation. The range of maturity of this material varied from extremely early to subtropical. The experiments, conducted in growth cabinets, examined photoperiods of from 10 to 20 h in 21/2-h increments. Constant day–night temperatures examined were 20, 25, and 30 C. Photoperiod and temperature affected number of days to tassel initiation. The response was not consistent for each genotype. As daylength increased from 10 to 20 h all but the earliest genotype, Gaspé Flint, took longer to reach tassel initiation. The latest hybrid, Pioneer X306, was affected relatively more by photoperiod. The delay in tassel initiation with longer photoperiods was apparent at all temperatures; however, the magnitude of the response was less at the high temperature. With longer photoperiods, there was an increase in the amount of vegetative growth and development prior to tassel initiation. This was apparent from the greater number of emerged leaves, the longer stem length, and the greater plant dry weight at tassel initiation.

scholarly journals Assessing antioxidant system and yield of maize (Zea mays L.) inbreds under elevated temperature condition

2021 ◽  
pp. 146-151
Author(s):  
L. Priyanandhini ◽  
M. K. Kalarani ◽  
A. Senthil ◽  
N. Senthil ◽  
K. Anitha ◽  
...  
Keyword(s):  
Zea Mays ◽  
High Temperature ◽  
Elevated Temperature ◽  
Temperature Stress ◽  
Elevated Temperatures ◽  
Zea Mays L ◽  
High Temperature Stress ◽  
Climatic Conditions ◽  
Reproductive Stage ◽  
Maize Inbreds

Maize (Zea mays L.) is the most important food and feed crop grown under diverse soil and climatic conditions. Among the cereals, demand for maize is increasing year after year, but fluctuation in climatic conditions especially the temperature extremes is the current and future threat in maize cultivation. Each degree Celsius increase in global mean temperature causes yield reduction up to 7.4 per cent in maize. The high temperature stress impact at the reproductive stage affects grain filling rate and duration. Adaptation of maize crop to future warmer climatic conditions requires a better understanding of physiological responses to elevated temperatures. With this view, a pot culture experiment was conducted at the Department of Crop Physiology, TNAU, Coimbatore during the summer season of 2020. Two maize inbreds viz., UMI 1230 and CBM-DL- 322 were taken for the study and exposed to high temperature stress treatments viz., T1 - ambient, T2 - ambient+4°C and T3 - ambient+6°C (44°C) for 10 days during the reproductive stage to assess the changes in biochemical and yield traits. The ambient+4ºC treatment revealed that the maize inbred line CBM-DL-322 recorded lower malondialdehyde content with over production of antioxidant enzyme activity (superoxide dismutase, catalase and ascorbate peroxidase). Cob weight and seed set parentage showed a negative correlation with both elevated temperatures. It is concluded that the maize inbreds line CBM-DL- 322 performed better at an elevated temperature at ambient+4°C and recorded more cob weight (57.09g) compared to UMI 1230 inbred (43.56g).

High temperature effects on photosynthate partitioning and sugar metabolism during ear expansion in maize (Zea mays L.) genotypes

2010 ◽  
Vol 48 (2-3) ◽  
pp. 124-130 ◽  
Author(s):  
Ryuichi Suwa ◽  
Hiroaki Hakata ◽  
Hiromichi Hara ◽  
Hany A. El-Shemy ◽  
Joseph J. Adu-Gyamfi ◽  
...  
Keyword(s):  
Zea Mays ◽  
High Temperature ◽  
Temperature Effects ◽  
Zea Mays L ◽  
Sugar Metabolism ◽  
Photosynthate Partitioning
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