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V. CEKAMAN GENANGAN

Materi kuliah ekofisiologi yang menjelaskan respon fisiologis tanaman terhadap cekaman genangan

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V. CEKAMAN GENANGAN

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  1. CROPS RESPONSE ON WATERLOGGING AHADIYAT YUGI RAHAYU

  2. RESPONS TANAMAN TERHADAP GENANGAN

  3. Keadaan fisiko-kimia utama yang terjadi pada rizosfer selama tergenang air dan perubahan metabolisme dan fisiologis yang diiukti oleh inisiasi respons adaptasi.

  4. Genangan memicu biosintesis dan akumulasi etilen , diikuti dengan induksi ekspresi RBOH ( Respiratory burst oxidase homologue) . Kegiatan RBOH mengarah ke produksi dan akumulasi O2 di apoplast

  5. Cell wall (CW); expansin (EXP); endoglucanase (EGase); polygalacturonase (PG); polygalacturonase inhibitor protein (PGIP); pectin/pectate lyase-like (PLL); phenylalanine ammonia-lyase (PAL); hydroxycinnamyl alcohol dehydrogenase (CAD); trans-cinnamate 4-hydroxylase (C4H); 4 coumarate CoA-ligase (4CL); ferulate 5-hydroxylase (F5H); caffeate O-methyltransferase (COMT); caffeoyl-CoA 3-O-methyl-transferase (CCoAOMT).

  6. SINTESIS PROTEIN

  7. Contoh Kedelai – Genangan Menurunkan pertukaran gas antara tanah dan udara yang mengakibatkan menurunnya ketersediaan O2 bagi akar. Ketidakseimbanganmetabolisme : Penghambatanpengangkutansitokinindariakarkebatang Penyerapangaram mineral yang tidakcukupakibatfotosintesis yang tidakmaksimal Permeabilitasakarterhadap air berkurang Akumulasibahanberacun yang disebabkanmikroba di sekitarakar (Salisbury & Ross, 1995)

  8. TUGAS TERSTRUKTUR – 2 JELASKAN RESPONS TANAMAN PADA KONDISI TERGENANG • JAGUNG • KACANG HIJAU • TEBU • KACANG TANAH BERIKAN PENJELASAN DISERTAI GAMBAR (NILAI LEBIH) DAN REFERENSI BAHASA ASING (NILAI LEBIH) ADA REFERENSI DARI jurnalagrin.net TUGAS DALAM BENTUK HARD COPY DAN SOFT COPY (ahadiyat_yugi@yahoo.com)

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