Al Farisy, Muhammad Ichsan (2018) Pengaruh Pra-Perlakuan Paraquat Terhadap Kandungan Senyawa Antioksidan Pada Tanaman Tembakau (Nicotiana tabacum L.) var.MKY Pada Kondisi Tercekam Kekeringan. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kekeringan merupakan faktor utama yang membatasi pertumbuhan dan perkembangan tanaman serta berpengaruh terhadap produktivitas tanaman di seluruh dunia, utamanya di daerah tropis. Salah satu bentuk pertahanan tanaman yaitu dengan melakuan mekanisme produksi antioksidan berupa asam askorbat. Penelitian ini bertujuan untuk mengetahui pengaruh (PQ) paraquat terhadap kandungan asam askorbat, klorofil, kandungan air relatif dan malondialdehid pada tembakau (Nicotiana tabacum L.) var. MKY yang dicekam kekeringan. Cekaman kekeringan dilakukan dengan cara melakukan penghentian pemberian air pada tanaman, serta digunakan PQ dengan konsentrasi 0.0005, 0.001, 0.0025, dan 0.005%. Parameter yang diukur adalah kandungan Malondialdehide (MDA), asam askorbat (AsA), klorofil, dan kandungan air relatif. Pemberian pra-perlakuan menggunakan paraquat dengan konsentrasi tersebut terbukti mampu meningkatkan kandungan senyawa antioksidan berupa asam askorbat, kandungan klorofil, kandungan air relatif, namun tidak berpengaruh signifikan terhadap kandungan malondialdehid. Paraquat dengan konsentrasi 0.001% dinilai merupakan konsentrasi yang paling optimal sebagai second messenger untuk meningkatkan respon N. tabacum dibawah cekaman kekeringan. ========================================================================================================================
Drought is the major factor that limit the plant growth and development also effected to plant productivity in the world, especially in the tropical country. Like other plants, tobacco also develop a defense mechanism to response drought stress. One of the response mechanism is producing an antioxidant such as ascorbic acid. The airm of this research in to understand the effect of PQ to ascorbic acid, chlorophyll, relative water, and malondialdehyde content on tobacco (Nicotiana tabacumL.) var. MKY in drought stress.Drought stressgiven by stopping the water treatment, and give paraquat (PQ) with low concentration (0.0005, 0.001, 0.0025, dan 0.005%). The measured parameter is Malondialdehyde content (MDA), ascorbic acid (T-AsA), chlorophyll, and relative water content. Based on these, the research about the antioxidant enhancement inthe drought condition is needs. Pretreatment with this consentration proved be able to increase the antioxidant content such as ascorbic acid, chlorophyll content, relative water content, but no significant effect on malondialdehyde. Pretreath paraquat with 0.001% is the most optimum concentration as a second messenger to increase N. tabacum response in drought stress condition
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSBi 583.952 Far p |
| Uncontrolled Keywords: | Antioksidan; MDA; Paraquat; ROS; N.tabacum var MKY |
| Subjects: | Q Science > QK Botany > QK754.7.D75 Droughts. Drought tolerance Q Science > QK Botany > QK899 Xanthone |
| Divisions: | Faculty of Natural Science > Biology > 46201-(S1) Undergraduate Thesis |
| Depositing User: | al farisy muhammad ichsan |
| Date Deposited: | 24 Apr 2018 03:19 |
| Last Modified: | 14 Jul 2020 07:26 |
| URI: | http://repository.its.ac.id/id/eprint/51050 |
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