Purslane (Portulaca oleracea L.) is a weed that can be used as a source of natural antioxidants. One of the ingredients in purslane is ascorbic acid (vitamin C). One of the preventive measures related to infections caused by the coronavirus is taking vitamin C to support the body’s immunity, which is proven to have a positive effect on the body’s immunity. Vitamin C can prevent susceptibility to reduce respiratory infections in certain conditions. The objective of this study was to get purslane plants (Portulaca oleracea L.) as a source of quality bioactive components of ascorbic acid (vitamin C) from various altitudes in East Java, Indonesia. The study conducted by taking purslane planting material in the lowlands 3 m above sea level (Rungkut, Surabaya); medium plains 593 m above sea level (DAU, Malang), and highlands 945 m above sea level (Bumi Aji, Batu Malang). Vitamin C analysis was carried out using LCMS (Liquid chromatography-mass spectrometry). The results of this study were the analysis of the content of purslane (Portulaca oleracea L). ascorbic acid (Vitamin C) from three altitudes was at highlands 9.24 mg/kg, medium plains 2.40 mg/kg, and lowlands 9.73 mg/kg.
Silicon is the second most abundant in the soil and Silicon could be considered as an essential element in many crops to enhancing growth and alleviating biotic and abiotic stresses. Silicon present exclusively and absorbed by plants in the form of silicic acid. Drought stress that occurs in plants inhibit of several metabolic processes in plant tissue, so that the availability of sufficient water in the soil becomes very important in plant cultivation. Plants have different adaptability to drought conditions, one of the efforts to increase plant resistance in conditions of limited water availability can be done with physiological engineering through controlling levels of proline, protein and abscisic acid, by giving silicon as an element that is known to increase power plants against drought. The results showed that silicon had closely related to decreased content of proline and abscisic acid, an increased in silicon concentration tended to decrease proline (R2 = 0.94) and abscisic acid (R2 = 0.95), and applying a higher silicon increased crude protein (R2 = 0.95).
ABSTRAKMutasi adalah satu cara untuk meningkatkan keragaman genetik dalam pemuliaan tanaman sehingga sifat yang dituju lebih mudah diperoleh. Biji dari tiga varietas jagung (Bisma, lokal Madura, dan Gumarang) diradiasi dengan sinar gamma 60 cobalt (dosis 0, 100, 200, dan 300 Gy) kemudian ditanam dalam rancangan petak terbagi dengan rancangan acak kelompok yang diulang tiga kali untuk dievaluasi karakter morfologi dan agronominya. Petak utama adalah varietas dan sebagai anak petak adalah dosis radiasi sinar gamma. Tidak terjadi interaksi nyata antara dosis sinar gamma dengan varietas jagung, namun peningkatan dosis sinar gamma menyebabkan penurunan beberapa sifat. Beberapa karakter seperti tinggi tanaman dan jumlah daun menurun secara nyata ketika dosis sinar gamma meningkat dari 100 menjadi 300 Gy, demikian juga komponen hasil seperti berat biji per tanaman dan jumlah biji per tongkol. Gamma 200 menghasilkan lebih banyak tongkol dibandingkan dosis yang lain. Varietas Bisma menunjukkan penampilan yang lebih baik dibandingkan Gumarang dan lokal Madura baik untuk sifat morfologi dan agronomi. Kata kunci: jagung, radiasi gamma, varietas ABSTRACTMutation is one of the ways to improve genetic variation in plant breeding so the target traits were more easily obtained. Grains of three varieties of maize (Bisma, Madura local, and Gumarang) were treated with gamma 60 cobalt irradiation doses (0, 100, 200, and 300 Gy) before sowing then planted in a split plot randomized block design with three replication, to be evaluated for their morphology and agronomic traits. The Main plot was cultivars and sub plot was gamma radiation rates. There was no interaction between gamma rates and cultivars of maize, but increasing of gamma rates caused decreasing of some traits. Some traits such as plant height and leaves number were decreased significantly when gamma rate increased 100 to 300 Gy as well yield components such as grain weight and grain number per ear. Gamma 200 caused produce more ears than other rates. Bisma exhibited greater performance than Madura and Gumarang both of morphology and agronomic traits.
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