ALLELOCHEMISTRY OF JENGKOL (Pithecolobium jiringa (Jack) Prain ex King) COAT AQUEOUS-EXTRACT ON AGRONOMICAL PROCESSES OF RICE SEED GERMINATION

Nurjannah, Uswatun and P. , Yudono and A.T. , Suyono and D. , Shieddiq (2016) ALLELOCHEMISTRY OF JENGKOL (Pithecolobium jiringa (Jack) Prain ex King) COAT AQUEOUS-EXTRACT ON AGRONOMICAL PROCESSES OF RICE SEED GERMINATION. In: Proceeding ISEPROLOCAL. Badan Penerbitan Fakultas Pertanian Universitas Bengkulu, Bengkulu, Indonesia, pp. 320-324. ISBN 9786029071184

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Abstract

Seed coat of jengkol fruit is a potential bioherbicide due to its phenolic content. An experiment was conducted to identify biochemical and physiological inhibitions of rice seed germination exposed to water extract of fresh fruit coat of jengkol. The experiment used a Randomized Complete Design of single factor of five extract concentrations in liquid formulation (water control, 20, 40, 60, 80 and 100 g/l), with five replications. Allelochemical inhibition of fresh jiringa hulls exstrac on rice seedling root components was stronger than those on shoot components. At day 7 of rice germination, reduction of root dry weight was 42%, root number 39%, and root length 70%; whereas at day 14, reduction of root dry weight was 63%, root number 36%, and root length 70%. In addition, shoot inhibition as indiced by dry weight at day 7 and day 14 of germination were 27% and 29%.

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