HUBUNGAN KARAKTERISTIK STOMATA DAN PRODUKTIVITAS UMBI PADA AKSESI LOKAL TERPILIH Dioscorea alata L.
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Abstrak
Stomata diketahui memiliki hubungan dengan aktivitas fisiologis tanaman seperti fotosintesis, respirasi, dan transpirasi yang berpengaruh terhadap produktivitas tanaman. Uwi (Dioscorea alata L.) merupakan salah satu tanaman umbi-umbian kurang termanfaatkan dengan nutrisi penting dan potensi hasil tinggi, namun kurang mendapatkan perhatian dari masyarakat. Minimnya informasi terkait faktor yang berperan dalam mendukung produksi yang melimpah, menjadi salah satu penyebab kurangnya minat budidaya jenis ini. Penelitian ini bertujuan untuk mengidentifikasi karakteristik stomata, produktivitas umbi, serta hubungan antara karakteristik stomata dan produktivitas umbi. Penelitian dilakukan di Kabupaten Pasuruan, menggunakan aksesi 57 dan 86 yang dipilih berdasarkan keunggulan produktivitas tinggi (bobot umbi). Analisis menggunakan uji T, Mann-Whitney, dan uji korelasi Spearman. Hasil studi menunjukkan aksesi 86 lebih tinggi dibandingkan aksesi 57 dalam hal jumlah stomata, kerapatan stomata, bobot umbi, lebar umbi, dan diameter umbi, meskipun pada ukuran keliling stomata dan panjang umbi aksesi 57 lebih tinggi. Jumlah dan kerapatan stomata memiliki korelasi positif dengan bobot umbi, sedangkan ukuran keliling stomata dengan bobot umbi menunjukkan korelasi negatif. Data bobot umbi aksesi 86 lebih besar nilainya dibandingkan aksesi 57, namun tidak berbeda nyata secara signifikan. Kedua aksesi ini berpotensi untuk dibudidayakan dengan memperhatikan kondisi lingkungan tanam agar produktivitas umbi uwi dapat dihasilkan secara optimal dan mendukung upaya diversifikasi pangan nasional berbasis komoditas lokal.
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