Phalaenopsis amabilis cultivated have many constraints such as the appearance of fusarium wilt disease caused by Fusarium oxysporum. Plantlet P.amabilis which resistant to F. Oxysporum was selected in the solid Vacin and Went (VW) medium was added with salicylic acid at concentrations of 65 ppm, 75 ppm, and 85 ppm, compared with controls (0 ppm). The goals of the research were to study and determine of: 1) The SA concentration of planlet P. amabilis selection tolerant; 2) The proper concentration of AS during in vitro selection for suppressing the Fo. The research was carried out in December 2015 to February 2016 in the Botany Laboratory (in vitro research room), Departement of Biology, Faculty of MIPA, Lampung University. The result showed that: 1) The SA tolerant concentration for plantlet selection with P. amabilis was between 65 ppm - 85 ppm. 2) The 85 ppm of SA was effective for suppressing the Fo compared to 65 ppm and 75 ppm. Keywords: Phalaenopsis amabilis, salicylic acid, Fusarium oxysporum, In vitro, Resistance.
Tujuan dari penelitian ini adalah untuk mengetahui efek dari pemberian pupuk organik cair rebung bambu terhadap pertumbuhan tanaman tomat (Solanum lycopersicum Mill.) dan mengetahui konsentrasi yang paling baik untuk pertumbuhannya. Penelitian ini telah dilaksanakan pada bulan Januari 2018 sampai bulan Februari 2018. Penelitian dilakukan di laboratorium lapang terpadu, Fakultas Pertanian Universitas Lampung dan laboratorium botani Fakultas Matematika dan Ilmu Pengetahuan Alam. Metode penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 16 perlakuan. Rebung Bambu Betung (Dendrocalamus asper (Schult) Backer e.x Heyne), rebung Bambu Tali (Gigantochloa apus (Schulft.f.) Kurz.), dan rebung Bambu Kuning (Bambusa Vulgaris) dengan konsentrasi pupuk organik cair masing-masing jenis bambu terdiri dari 6 konsentrasi yaitu : kontrol (0%), 5%, 10%, 15%, 20%, dan 25%, dilakukan ulangan sebanyak 2 kali. Analisis data menggunakan langkah-langkah yaitu uji homogenitas menggunakan uji levene dengan taraf 5% dan uji ragam (ANOVA). Hasil penelitian menunjukkan perlakuan pupuk organik cair rebung bambu betung dengan konsentrasi 10% (A1B2) perlakuan yang terbaik terhadap tinggi tanaman, panjang akar, berat kering, kandungan klorofil a dan kandungan klorofil b, namun tidak berpengaruh terhadap kandungan klorofil total tanaman tomat.
PENDAHULUANApel (Malus sylvestris (L.) Mill) adalah tanaman yang berasal dari daerah Asia Barat. Tanaman ini hidup pada daerah beriklim subtropis dengan temperatur atau kondisi udara yang dingin. Di Indonesia apel mulai dibudidayakan sejak tahun 1934 hingga saat ini. Salah satu wilayah di Indonesia yaitu kota malang yang menghasilkan banyak buah apel. Kota Malang memiliki iklim yang sangat cocok untuk penanaman dan pembudidaya buah apel. Buah Apel merupakan buah yang tergolong populer di seluruh dunia karena mempunyai rasa yang sangat menyegarkan. Buah apel memiliki nilai penting dalam segi ekonomi dan mempunyai kandungan gizi yang baik untuk kesehatan (Soelarso, 1997).
The aim of this experiment was to determine the effect of the addition of ash and sandcompost proportion in the media on the growth of sorghum (Sorghum bicolor L.)
PENDAHULUANSorgum (Sorghum bicolor L.) merupakan tanaman yang berpotensi untuk dikembangkan. Sebab tanaman sorgum memiliki daya adaptasi yang luas, toleran terhadap kekeringan, produktivitas tinggi, dan tahan terhadap hama dan penyakit. Selain budi daya yang mudah, sorgum mempunyai manfaat yang luas, antara lain bisa dimanfaatkan sebagai pakan ternak, bahan pangan, dan bahan industri (Yulita dan Risda 2006).
Cabai merupakan salah satu komoditas tanaman yang sangat penting dan banyak dibutuhkan oleh masyarakat. Namun produksi buah cabai menurun karena serangan penyakit yang disebabkan oleh jamurColletotrichum sp.. Salah satu cara untuk mengendalikan penyakit ini yaitu dengan menggunakan ekstrak daun tumbuhan seperti Carica papaya L. Adapun tujuan dari penelitian ini adalah untuk mengetahui pengaruh getah papaya yang berasal dari daun dalam mengendalikan penyakit antraknosa yang disebabkan oleh jamur Colletotrichum sp.dan menentukan konsentrasi yang optimum dari daun papaya dalam menekan pertumbuhan dan perkembangan jamur Colletotrichum sp. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 6 perlakuan yaitu konsentrasi ekstrak daun pepaya : 0%, 1%, 2%, 3%, 4%, dan 5%. Selanjutnya dilakukan analisis ragam dan dilanjutkan dengan Uji BNT 5%. Hasil penelitian menunjukkan bahwa konsentrasi ekstrak daun pepaya 5% mampu memperlambat munculnya gejala serta mampu menurunkan intensitas serangan dan susutnya bobot buah cabai
Fruit is a necessity for most Indonesian people. Kepok banana is a climacteric fruit that can experience browning quickly. Therefore, this study was conducted to find a safe and effective material to prevent the browning process of kepok bananas. This study aims to determine the differences in the browning index, and the activity of the enzyme dehydrogenase in kepok banana cells. This study was conducted using a 2x3 factorial design. Factor A is ascorbic acid with 2 concentration levels namely 0% (b / v) and 5% (b / v). Factor B is Aloe (Aloebarbadensis L.) leaf extract with 3 levels, namely 0%, 5%, and 10%. The quantitative parameters are browning index and total dissolved carbohydrate content. The qualitative parameter is dehydrogenase enzyme activity. Levene test and variance analysis were carried out with 5% real level. The results obtained were kepok bananas with treatments coloured brighter than control. Ascorbic acid and Aloe (Aloe barbadensis L.) affect the browning index and dissolved total carbohydrate content of the sample. A decrease in dehydrogenase enzyme activity happened in the ascorbic acid treatment. Conclusions obtained from the study are ascorbic acid with a concentration of 5% can reduce the browning index of kepok banana by 31%, ascorbic acid with a concentration of 5% can maintain total dissolved carbohydrate content kepok banana as much as 53%, and Aloe extract 10% retain total dissolved carbohydrate content sample is 20%.
The purpose of this study was to find out how effective citric acid is against the nonenzymaticprocess of browning Yali Pear fruit juice (Pyrus bretschneideri Rehd. Theresearch was conducted in a complete randomized design consisting of 5 replications. Thenon-enzymatic browning inhibition process was tested with citric acid treatment as the mainfactor with five concentrations ie 0% w/v, 2,5% w/v, 5% w/v, 7,5% w/v and 10% w/v.Qualitative parameters were dehydrogenase enzyme activity and reducing sugar level.Quantitative parameters were browning index and total soluble carbohydrate content.Levene test, analysis of variance, and Tukey test were performed at 5% significant level. Theresults showed that decrease in dehydrogenase enzyme activity occurs along with increasingthe concentration of citric acid. The level of reducing sugar has increased along with theincrease of citric acid concentration. The 7,5% w/v citric acid concentration effectivelyinhibited non-enzymatic browning of Yali Pear juice with a 21% reduction in the browningindex. Total soluble carbohydrate content increased 7% at 7.5% w/v citric acidconcentration. From the results of the study it was concluded that citric acid at 7,5% w / vconcentration was the inhibitor of non-enzymatic browning and dehydrogenase enzymeactivity, but stimulator of total soluble carbohydrate and reducing sugar level.
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