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Journal : microbiology indonesia

The Quality of Physic Nut (Jatropha curcas) Seeds Affected by Water Activity and Duration of Storage OKKY SETYAWATI DHARMAPUTRA; RANTJE LILLY WORANG; RIZAL SYARIEF; . MIFTAHUDIN
Microbiology Indonesia Vol. 3 No. 3 (2009): December 2009
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.293 KB) | DOI: 10.5454/mi.3.3.6

Abstract

The quality of physic nut (Jatropha curcas) seeds should be maintained during storage, either as seeds for seedlings or oil production to be used for biodiesel. The effects of water activity and duration of storage on the quality, i.e. fungal population, lipid, fatty acid and free fatty acid contents, and viability of physic nut seeds were investigated. The results showed that the moisture content of seeds and total fungal population decreased at low water activities, and increased at high water activities (aw). At aw 0.64, at the beginning of storage and after 20 weeks of storage, total fungal populations were 5.4 x 103 and 1.8 x 102 cfu g-1 dry basis (db), respectively. At aw 0.93, at the beginning of storage and after 20 weeks of storage, total fungal populations were 5.0 x 103 and 3.3 x 106 cfu g-1 db, respectively. At the beginning of storage fungi infecting seeds were field fungi, i.e. Cladosporium sp., Colletotrichum sp., Fusarium semitectum, and F. verticillioides. The population of field fungi decreased with the increase of storage duration. They were replaced by postharvest fungi, i.e. Aspergillus restrictus, A. penicillioides, Eurotium chevalieri, E. rubrum, Penicillium citrinum, P. implicatum and P. oxalicum. Lipid content and viability of seeds decreased with the increase of water activities and seed moisture contents, while free fatty acid contents increased with the increase of water activities and seed moisture contents during storage. Fatty acids of lipid were dominated by unsaturated fatty acids, i.e. oleic and linoleic acids. Physic nut seeds could be stored at aw 0.64-0.75 up to eight weeks when the seeds will be used for seedling, or up to 16 weeks when they will be used for producing oil.
Co-Authors , Triadiati AD Ambarwati ADEEL ABDUL KARIM ALTUHAISH Afifah Azkiyah Ahmad Dwi Setyawan Ahmad Tarmidi Albarokah, Nurdiansyah ALEX HARTANA ALEX HARTANA Amarullah, Mohammad Syarifuddin Ambarwati, AD Anarki, Aprillia Alling Anjar Tri Wibowo Arafah, Purnama Aris Tjahjoleksono Asep Muhyiddin, Asep Astuti, Ristanti Puji Atang Sutandi Awik Puji Dyah Nurhayati Aziz, Alvi Bachtiar, Machdum BUDI SETIADI DARYONO Budiarto, Despiyan Dwi CHAIDIR CHAIDIR Dasumiati Dasumiati Desvian Bandarsyah Devi Media Siska Dewi Indriyani Roslim DIANA AGUSTIN CAROLINA DIBYO PRONOWO Dwi Jatmoko Dwi Suci Setyaningsih DWINITA WIKAN UTAMI Dwinita Wikan Utami Eka Setiawan Ellen Aurelie Basuki Fahrurrozi Fahrurrozi Faiz, Agus Maulana Fauzobihi, Fauzobihi Fuad Fitriawan, Fuad Habizar, Habizar Hafizhni Anggia, Rafi HAJRIAL ASWIDINNOOR Hamim Hamim Hanarida, I Harisca, Rodhi Hartanti, Fajri Hartati, N Sri Hilda Sari Wardhani HIMMAH RUSTIAMI Himmah Rustiami, Himmah I Hanarida I PUTU GEDE P. DAMAYANTO I PUTU GEDE P. DAMAYANTO, I PUTU GEDE P. I Rosdianti Ilham Dinar Akbar Cudino Iman Rusmana Iswandi Anas Isya, Mandanu Akhta Nur Iwan, Pristanto Ria Irawan J PERRY GUSTAFSON Joko Prasetiyono JULIARNI JULIARNI Juliyani Juliyani Kamini, Kamini Khoirurrijal Khoirurrijal, Khoirurrijal Komalasari, Selly Siti Komalasari Kustiariyah, Kustiariyah Kusumanegara, Kusumawaty LA KOLAKA Latifah, Vida Rahma M Ilham Fahmi Roji MARIA BINTANG Marlina Ardiyani Meitha, Karlia Moeljopawiro, Sugiono Muchozin, Muhammad Ni'an Muhammad Akbar Velayati Muhammad Alfarabi Mukhlash Abrar Munif Ghulamahdi Muslimin Muslimin MUTTAQIN, MAFRIKHUL Nadzar Saifudin Nasir, Fahad Muhammad Nasir Nettyani, Naipospos Nugroho, Giri Nunung Fajaryani, Nunung Nurlaela Nurlaela Nurlaela Nurlaela Nurlaila, Santi Nurlaila OKKY SETYAWATI DHARMAPUTRA Perdana, Habain Sila Pieter Agusthinus Riupassa Polosoro, Aqwin Prasetiyono, Joko Purwanti, Tira Puspita Dewi Sopyati Putri Aulia Putro, Karso Suryo Raden Mohamad Herdian Bhakti RANTJE LILLY WORANG Rasyid, Aliy Ratih Dwi Astuti Ratnasari, Seli Risa Aryantri Rizal Nursamsi, Dede RIZAL SYARIEF Robby Maududy Rosandi Ardi Noegraha Rosdianti, I Ruwirohi, Jan Everhard S Yuriyah Sahab, Fahmi Sahab Sairun Sairun Salimah, Hafshah Aqidatun Samsul Arifin Sandra Arifin Aziz Sartika, Dian Setiawan Setiawan Setiawan, Jeffry SISWA SETYAHADI Siti Maryam Harahap Slamet, Oky Sobir Sobir Sokoy, Mercy Sopandi, Nur Irfan Srifariyati, Srifariyati Sudirman Yahya Sugeng Heri Suseno Sugiono Moeljopawiro Suharsono Suharsono Suharsono Suharsono Suharsono Suharsono Suharsono, Suharyadi Suharyadi Sulistiani, Erina Supena, Ence Darmo Jaya Sutiarso Sutiarso Suwaji Handaru Wardoyo Suwarno Suwarno Suwarno Suwarno TATIK CHIKMAWATI Tnunay, Ite Morina Yostianti Toto Hadiarto Trikoesoemaningtyas Turhadi Turhadi Utut Suharsono Utut Widyastuti Violita Violita Wardhani, Hilda Sari Wening Enggarini Windarti Wahyuningtyas Windriyana, Windriyana Yuriyah, S Yusrian, Afif Ramdhan Yusuf, Adib Fakhruddin Yuyun Rohmatul Uyuni Zurtiana, Ahmad