Chemical Priming untuk Meningkatkan Ketahanan Benih Padi pada Masa Pembibitan dalam Kondisi Cekaman Salinitas
Chemical Priming to Increase Rice Seed Resilience During Seedling Stage Under Salinity Stress
Abstract
Kandungan garam yang tinggi pada areal pertanian di sekitar pantai menjadi kendala dalam intensifikasi pertanian terutama tanaman pangan seperti padi. Kondisi salinitas pada lahan pertanian terbukti telah menghambat pertumbuhan dan menurunkan hasil panen. Terutama pada fase perkecambahan yang merupakan fase paling rentan terhadap kondisi salin. Untuk itu diperlukan upaya untuk menangani kendala tersebut. Salah satu upaya yaitu dengan melakukan priming benih, priming benih merupakan metode pra-perlakuan benih yang dilakukan untuk meningkatkan ketahanan benih sebelum benih terkena cekaman abiotik. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) faktorial dengan 2 faktor perlakuan. Faktor pertama cekaman salinitas dengan tiga taraf perlakuan yaitu 0 mM, 50 mM, 100 mM, dan 150 mM. Faktor kedua yaitu priming kimia benih yaitu: kontrol (tanpa priming), asam salisilat 225 ppm, asam salisilat 250 ppm, asam askorbat 10 ppm, dan asam askorbat 20 ppm. Bertambahnya tingkat salinitas dapat menurunkan rataan persentase perkecambahan dan panjang radikula. Namun, kadar prolin meningkat dengan meningkatnya konsentrasi salinitas. Priming benih dengan menggunakan asam salisilat 225 ppm dan 250 ppm maupun priming menggunakan asam askorbat 10 ppm dan 20 ppm dapat Perlakuan priming dengan menggunakan asam salisilat 225 ppm dan 250 ppm maupun asam askorbat 10 ppm – 20 ppm mampu meningkatkan ketahanan benih untuk berkecambah pada kondisi salinitas yang tinggi (150 mM).
Kata kunci : asam salisilat, asam askorbat, chemical priming, padi, salinitas.
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