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Influence of
temperature, light and plant growth
regulators on germination of black pepper (Piper
nigrum L.) seeds
Zhigang Li*, Aiqin Liu,
Huasong Wu, Lehe Tan, Yuzhou Long, Yafeng Gou, Shiwei Sun
and Liwei Sang
Spice
and beverage research institute, Chinese academy of tropical
agricultural sciences, Xinglong, Hainan, 571533, China.
*Corresponding author. E-mail:
akinjournal2000@yahoo.com.
Abbreviations: GA3,
Gibberellic acid; IAA, indole-3-acetic acid; KT,
Kinetin; CK, control treatment.
Accepted
29 January, 2010 |
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Effects
of temperature, light and different concentrations of plant
growth regulators on germination of Piper nigrum L.
seeds was studied under controlled environmental conditions.
Black pepper seeds were placed in Petri dishes with
filtration papers and the germination and radical
development followed during eighteen days periods. The seeds
generally germinated within six or seven days. There was no
difference in percent germination between dark and light
treatments, but the development of radical length was
significantly influenced by both light and temperature.
Germination was highest at 30°C, but seeds also germinated
at 25 and 35°C. No germination was observed at low (20°C)
and high (40 and 45°C) temperatures. The plant growth
regulators enhanced the seeds germination and radical length
different degree. The results are consistent with the
Piper nigrum L. being recalcitrant species need a
certain environment condition to germinate.
Key
words:
Temperature, light, plant growth regulator, black pepper,
Piper nigrum L. |
