Tujuan dari penelitian ini adalah untuk mengetahui pengaruh aplikasi abu sekam terhadap kandungan prolin dan silikat daun serta kualitas hasil yaitu protein dan amilosa biji padi gogo dan hubungan korelasi antar keempat komponen tersebut pada kondisi pertanaman 80 persen kapasitas lapang pada skala pot. Penelitian dilakukan di polibag dalam screen house Fakultas Pertanian Unsoed dengan menggunakan rancangan acak kelompok pola faktorial dengan faktor varietas (Situ patenggang, Limboto, Towuti, Batutegi dan Aek sibundong) dan faktor abu sekam (0, 2, 4, 6 t/ha), diulang tiga kali. Hasil penelitian menunjukan bahwa pemberian abu sekam dosis 2−6 t/ha mampu meningkatkan kandungan silikat daun antara 18,49−29,43% dan menurunkan kandungan amilosa biji pada lima varietas sekitar 4,19−6,92%. Pemberian abu sekam dosis 2−6 t/ha mampu meningkatkan kandungan prolin daun antara 27,56−70,63% dan protein biji antara 2,35−16,71%. Antarvarietas menunjukan bahwa kandungan prolin tertinggi dihasilkan oleh varietas Batu tegi 18,58 persen dan protein biji pada varietas Situ patenggang 9,55%. Terdapat korelasi antar karakter fisiologis yaitu antara silikat-prolin (0,62) dan kandungan protein-amilosa biji (-0,78).

Effect of Pseudomonas fluorescens P60 on pathological and physiological quality and growth of rice IR 64  seedlings. The research objectives were (1) detection and identification of seed-borne pathogens of IR 64 rice, (2) testing Pseudomonas fluorescents P60 in inhibiting the in vitro growth of seed-borne pathogens colonies, (3) testing P. fluorescents P60 for pathological and physiological seed quality, and (4) testing P. fluorescents P60 on the growth of seedlings in the greenhouse. The results showed that some seed-borne pathogens can be found both on farmers’ IR 64 rice and factory’s; they were Aspergillus flavus, Alternaria padwickii, Pseudomonas glumae, and P. syringae. Application of P. flourescens P60 was able to inhibit the in vitrogrowth of colonies of all seed-borne pathogens, except P. syringae.  Related to pathological quality, the effect of P. flourescens P60 on percentage of seed-borne pathogens attack did not significantly different from that of benomil but smaller than distilled water. On the physiological quality of seeds, treatment of P. flourescens P60 has the same effect with benomil and distilled water, with  germination rate was more than 80%. In the greenhouse study,treatment of seed immersion time  in P. flourescens P60 suspension showed that the effect of immersion time as long as15 minutes and 25 minutes on  seedling height, root length, and seedling dry weightdid not significantly different. were. However, 25 minutes immersion time resulted in fresh seedling weight and root dry weight higher than that of 15 minutes immersion time.

Rahayu, A.Y. • dkk: Pertumbuhan dan hasil padi gogo hubungannya dengan kandungan prolin dan 2-acetyl-1-pyrroline pada kondisi kadar air tanah berbeda Rahayu, A.Y. • T.A.D. Haryanto • S. N. Iftitah Pertumbuhan dan hasil padi gogo hubungannya dengan kandungan prolin dan 2-acetyl-1-pyrroline pada kondisi kadar air tanah berbeda Growth and yield of aromatic upland rice related to proline and 2-acetyl-1-pyrroline content at different soil water content Abstract The objectives of this study was to know the responses of upland rice under different soil water content on growth and yield, and proline and 2-acetyl-1-pyrroline contents. The experiment was conducted in Tidar Magelang University from September 2012 to March 2013. Randomized Complete Block Design with factors of upland rice variety viz. Inpago Unsoed-1, JSPGA 136, Situbagendit and Mentik Wangi, and different soil water content viz. 100 % of field capacity and 50 % of field capacity were tested. The observed variables were plant height (cm), total number of tillers (stems), number of productive tillers (stems), total root length (m), flowering time (day), harvest time (day), length of panicle (cm), number of grain per panicle, 1000 grain weight (g), grain weight per hill (g), proline content (  M/g) and 2-acetyl-1-pyrroline content (ppm).In general, at 50 % field capacity plant growth and yield upland rice were low but it was high results on proline and 2-acetyl-1-pyrroline contents. The experiment showed that Mentik wangi variety had the high results on plant growth and yield and contents of proline and 2acetyl-1-pyrroline at 50 % field capacity of soil water content.

Penelitian ini bertujuan untuk mengetahui respons varietas padi gogo pada kadar air tanah berbeda terhadap pertumbuhan, hasil dan kandungan prolin dan 2-acetyl-1-pyrroline biji. Penelitian dilaksanakan di Universitas Tidar Magelang mulai bulan September 2012 sampai dengan Maret 2013. Percobaan menggunakan Rancangan Acak Kelompok Lengkap terdiri atas dua faktor yaitu varietas padi gogo (Inpago Unsoed-1, galur JSPGA 136, varietas Situ-bagendit (non-aromatik) dan varietas Mentik Wangi) dan tingkat kadar air tanah (100 % kapasitas lapang dan 50 % kapasitas lapang). Variabel pengamatan meliputi: tinggi tanaman (cm), jumlah anakan total per rumpun (batang), jumlah anakan produktif (batang), total panjang akar (m), umur berbunga (hst), umur panen (hst), panjang malai (cm), jumlah bulir per malai, bobot 1000 biji (g), bobot biji per rumpun (g), kandungan prolin (μM/g) dan kandungan 2-acetyl-1-pyrroline (ppm). Secara umu padi gogo yang ditanam pada kondisi kadar air tanah 50 % kapasitas lapang menghasilkan umur panen panjang dengan pertumbuhan dan hasil rendah namun memiliki kandungan prolin dan kandungan 2-acetyl-1-pyrroline lebih tinggi diban-dingkan dengan yang ditanam pada kondisi kadar air tanah 100 % kapasitas lapang. Namun demikian, pada kondisi kadar air tanah 50 % kapasitas lapang, varietas Mentik Wangi menunjukan hasil tinggi pada karakter pertumbuhan dan hasil serta kandungan 2-acetyl-1-pyrroline dan kandungan prolin. Kata kunci: Padi gogo ∙ Kadar air tanah ∙ Pertumbuhan ∙ Hasil ∙ Prolin ∙ 2-acetyl-1-pyrroline

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