Mathematical Description of the Influence of Temperature and Seed Quality on Imbibition by Seeds of Corn ( Zea mays L.) 1

Crop Science ◽  
1972 ◽  
Vol 12 (5) ◽  
pp. 643-646 ◽  
Author(s):  
W. M. Blacklow
Keyword(s):  
Zea Mays ◽  
Mathematical Description ◽  
Seed Quality ◽  
Zea Mays L ◽  
Influence Of Temperature

scholarly journals THE EFFECT OF DRYING TEMPERATURE ON CORN SEED QUALITY

1984 ◽  
Vol 64 (3) ◽  
pp. 487-496 ◽  
Author(s):  
ROBERT J. NAVRATIL ◽  
JOSEPH S. BURRIS
Keyword(s):  
Zea Mays ◽  
Seed Quality ◽  
Zea Mays L ◽  
Field Performance ◽  
Dry Weight ◽  
Cold Test ◽  
Drying Temperature ◽  
Mean Values ◽  
Corn Seed ◽  
Inbred Parent

Seed produced on three widely grown public corn (Zea mays L.) inbreds were tested for tolerance to drying injury. Inbred parents A632, B73, and Mo17 were grown in 1979 and 1980. The single cross H99 × H95 was used as a pollinator both years. Random ear samples were collected, to obtain ears with moisture percentages ranging from approximately 50 to 20%, and dried to 12% moisture at 35 °C, 40 °C, 45 °C, and 50 °C. Inbred parents were found to differ in tolerance to high drying temperatures. A632 was the most tolerant to high drying temperatures whereas B73 and Mo17 were relatively intolerant. Field performance of dried seed was similar to that observed in laboratory tests. Combined analyses yielded significant inbred-parent by harvest-moisture by drying-temperature interactions for germination and cold-test emergence percentages. These interactions do not allow for simple recommendations of safe harvest moistures and drying temperatures. Components from the combined analysis that had a P > F of 0.30 or less were then used to predict mean values for A632, B73, and Mo17 germination, cold-test emergence, seedling dry weight and the ratio of shoot to root dry weight. Values for the ratio variable indicated that root development is more susceptible to injury than is shoot development. These predicted values provide seed producers with information on the quality responses that they could expect when seed of A632, B73, or Mo17 is harvested at different moisture contents and dried at different drying temperatures.Key words: Drying, seed quality, Zea mays L.

scholarly journals Emergence of improved varieties of maize (Zea mays L.) as affected by different soil types and planting depths in Chitwan, Nepal

2013 ◽  
Vol 1 ◽  
pp. 23-27
Author(s):  
MN Paudel
Keyword(s):  
Zea Mays ◽  
Seed Quality ◽  
Zea Mays L ◽  
Sandy Loam ◽  
Seed Vigor ◽  
Soil Types ◽  
Red Clay ◽  
Maize Varieties ◽  
Emergence Percentage ◽  
Population Maintenance

Improved open pollinated maize (Zea mays L.) varieties exhibit different emergence reaction as a result of either inferior seed quality or affected by agronomic practices of maize planting. To address problem of low emergence percentage of maize varieties, an experiment was laid out in factorial design under two types of soil (red clay and sandy loam), three level of depth of sowing (7, 14 and 21 cm) for Rampur Composite, Manakamana-1 and Arun-2 maize varieties in Rampur, Chitwan for representing main season (May-August). The result of the experiment revealed that emergence count was highly significant for soil types and depth of sowing among the maize varieties tested. Manakamana-1 expressed lowest percentage (20 and 29%) followed by Arun-2 (22 and 33%) and Rampur Composite (24 and 39%) of emergence under red clay and sandy loam soils, respectively. Likewise, emergence count at 10 days after sowing was recorded highly significant for depth of showing indicating that irrespective of varieties higher the planting depth lower the emergence count.. There was a positive relation between depth of planting and length of mesocotyle resulting loss of seed vigor which furnished low emergence of the maize varieties. It is suggested that depth of sowing affect emergence percentage which consequently have effects on plant population maintenance. Hence, it was concluded that sowing below 7cm deep is not feasible for the tested varieties under red clay and sandy loam soils. DOI: http://dx.doi.org/10.3126/ajn.v1i0.7539 Agronomy Journal of Nepal (Agron JN) Vol. 1: 2010 pp.23-27

Relationship between changes in endogenous polyamines and seed quality during development of sh2 sweet corn (Zea mays L.) seed

2010 ◽  
Vol 123 (3) ◽  
pp. 301-307 ◽  
Author(s):  
D.D. Cao ◽  
J. Hu ◽  
S.J. Zhu ◽  
W.M. Hu ◽  
A. Knapp
Keyword(s):  
Zea Mays ◽  
Seed Quality ◽  
Zea Mays L ◽  
Sweet Corn

PHYSIOLOGICAL STUDIES ON THE EFFECTS OF DRYING TEMPERATURES ON CORN SEED QUALITY

1984 ◽  
Vol 64 (3) ◽  
pp. 497-504 ◽  
Author(s):  
NADER SEYEDIN ◽  
JOSEPH S. BURRIS ◽  
THOMAS E. FLYNN
Keyword(s):  
Electrical Conductivity ◽  
Zea Mays ◽  
Seed Quality ◽  
Zea Mays L ◽  
Embryonic Axis ◽  
Percentage Germination ◽  
Drying Process ◽  
Drying Temperature ◽  
Corn Seed ◽  
Hydrolysis Of

The effects of drying temperatures on certain physiological parameters associated with germination of corn (Zea mays L.) seed were determined on two commonly grown inbreds. Seed produced on both maternal inbreds Mo17 (intolerant of high drying temperatures) and A632 (relatively tolerant) leached significantly more sugars into water when dried at 50 °C than at 35 °C. Leaching was most pronounced during the first hour. Electrical conductivity of leachate from maternal inbreds Mo17 and A632 was greater for seed dried at 50 °C than at 35 °C. Seedlings grown from embryos of the maternal inbred Mo17 seed dried at 50 °C had significantly lower shoot and root dry weights and percentage germination than did seedlings grown from embryos of Mo17 seed dried at 35 °C. Histochemical light microscopy of Mo17 and A632 embryos showed that the number of starch grains in the embryonic axis was substantially reduced by the high drying temperature. Embryos from Mo17 seed dried at 50 °C contained a carotenogenic pigment. Almost none of this pigment was produced by A632. Our results suggest that the high drying temperature may result in hydrolysis of starch in the embryonic axis of the seed during the early stages of the drying process. The greater electrical conductivity of leachate from seed dried at 50 °C than those dried at 35 °C may be indicative of membrane damage.Key words: Seed drying, histochemistry, embryo, culture, membrane, Zea mays L.

Oil Content as a Measure of Seed Quality in Corn 1 ( Zea mays L.)

Crop Science ◽  
1966 ◽  
Vol 6 (1) ◽  
pp. 88-88
Author(s):  
Sutat Sriwatanapongse ◽  
L. F. Bauman
Keyword(s):  
Zea Mays ◽  
Oil Content ◽  
Seed Quality ◽  
Zea Mays L
Sign in / Sign up

Export Citation Format

Share Document