Replacement of chilling requirement in seeds of Ruellia humilis by gibberellic acid

Planta ◽  
1970 ◽  
Vol 94 (3) ◽  
pp. 250-252 ◽  
Author(s):  
Jerry M. Baskin ◽  
Carol C. Baskin
Keyword(s):  
Gibberellic Acid ◽  
Chilling Requirement ◽  
Ruellia Humilis

Breakage of Seed Dormancy of Field Pennycress (Thlaspi arvense) by Growth Regulators, Nitrate, and Environmental Factors

Weed Science ◽  
1987 ◽  
Vol 35 (6) ◽  
pp. 802-806 ◽  
Author(s):  
Hargurdeep S. Saini ◽  
Pawan K. Bassi ◽  
J. Stephen Goudey ◽  
Mary S. Spencer
Keyword(s):  
Low Temperature ◽  
Environmental Factors ◽  
Gibberellic Acid ◽  
Growth Regulators ◽  
Chilling Requirement ◽  
Dormant Seed ◽  
Thlaspi Arvense ◽  
Temperature Regimes ◽  
Field Pennycress ◽  
Treated Seed

Effects of ethylene, gibberellins, kinetin, nitrate, light, and temperature, each alone or combined with other factors, were studied on the germination of dormant seed of field pennycress (Thlaspi arvenseL. # THLAR). Treated seed were incubated at a range of constant temperatures, at temperatures alternating daily between 12 and 22 C (12 h each), or at 12 C followed by transfer to 22 C. No germination ocurrred in water under any conditions. When applied in the dark KNO3had no effect on germination under any of the temperature regimes. A combination of KNO3, light, and a shift in temperature from 12 to 22 C induced 100% germination. Four days of incubation at 12 C induced maximal seed sensitivity towards KNO3+ light, and the sensitivity remained unchanged if the incubation at 12 C was extended to 15 days. Upon transfer to 22 C, the effect of low-temperature incubation was lost within 3 days. Of the two seed lots studied, one had a relatively lower chilling requirement, but both had similar requirements for light and KNO3. Gibberellic acids4+7(GA4+7) induced 100% germination in the dark or light at all temperature regimes. Gibberellic acid3(GA3) was promotive under isothermal conditions, but its effectiveness was enhanced by a shift in temperature from 12 to 22 C. Kinetin or ethephon, each applied alone, had little effect on germination. Ethephon and GA3together induced 100% germination.

Effects of Defoliation and Foliar Application of Gibberellic Acid on Fruit Softening after Alcohol Treatment of Japanese Persimmon 'Hiratanenashi'.

1994 ◽  
Vol 62 (4) ◽  
pp. 867-875 ◽  
Author(s):  
Hiroyuki Itamura ◽  
Tadaaki Fukushima ◽  
Toshio Kitamura ◽  
Hisashi Harada ◽  
Satoshi Taira ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Foliar Application ◽  
Alcohol Treatment ◽  
Fruit Softening ◽  
Japanese Persimmon
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