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Research articles

ScienceAsia (): 384-392 |doi: 10.2306/scienceasia1513-1874...384


Pollen viability, germination, and seed setting of Nelumbo˙nucifera


Akhom˙Khatfana, Zuo˙Lib, Long-Qing˙Chenc, Nopadol˙Riablershiruna, Vithaya˙Sathornviriyapongd, Niran˙Juntawonga,e,*

 
ABSTRACT:     In tropical countries, low seed setting is a major problem when cultivating lotus (Nelumbo nucifera Gaertn.). This study determined seed setting in six wild lotus cultivars: Sai Rung (SR), Sam Roi Yot (SY), Klong Yong, Puttha Monthon (PM), Rachine (RC), and Nakhon Sawan (NW). In nature, the seed-setting rates range from 52–78%. From a stigma removal study, only a 53% seed-setting rate by self-pollination was recorded in the SR cultivar. This result was similar to the seed setting of self-pollinated PM, although high viability of PM pollen from day˙2 full bloom flowers was observed. Self-incompatibility was studied in RC and NW cultivars. The indices of self-incompatibility of RC and NW were both 96% indicating that self-incompatibly affects low seed setting in these two cultivars. The results showed that the low seed-setting rate also came from seed abortion. A high value of self-incompatibility was observed in RC and NW cultivars, but not in the other cultivars studied.

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a Department˙of˙Botany, Faculty˙of˙Science, Kasetsart˙University, Bangkok˙10900˙Thailand
b Guangdong˙Key˙Labs˙of˙Ornamental˙Plant˙Germplasm˙Innovation˙and˙Utilization, Floricultural˙Research˙Institute, Guangdong˙Academy˙of˙Agricultural˙Sciences, Guangzhou˙510640, China
c Key˙Laboratory˙of˙Horticultural˙Plant˙Biology, College˙of˙Horticulture˙and˙Forestry˙Sciences, Huazhong˙Agricultural˙University, Wuhan˙430070, China
d Department˙of˙Horticulture, Faculty˙of˙Agriculture, Kasetsart˙University, Bangkok˙10900˙Thailand
e Centre˙for˙Advanced˙Studies˙in˙Tropical˙Natural˙Resources, National˙Research˙University-Kasetsart˙University˙(CASTNAR,˙NRU-KU), Bangkok˙10900˙Thailand

* Corresponding author, E-mail: fscinrj@ku.ac.th

Received 10 Jul 2013, Accepted 12 Nov 2014