Abstract
Hoya coronaria found in heath forest of Air Anyir, Bangka has diverse colors. Flowers color diversity sometimes correlated varieties or the result of color changes during flowering process. The flowers development process observed from 5 H. coronaria varieties with different color from heath forest of Air Anyir, Bangka.The purpose of this research to know the flowering process and flower color change process some varieties of H. coronaria. This research done from September 2015-January 2016. This study used qualitative method to made detail and systematic description about flowering phase. H.coronaria flowering process consists of flower initation, flower estabilisment and flower development. Flower initation needs 13-15 days, flower estabilisment needs 10-12 days and flower development consists of early blooming process, full blooming and senescene. Early blooming process needs 1-3 days, full blooming needs 5-12 days and senescene needs 1-3 days. During the development process changes from rounded to pentagonal shape and there is a change in size. The observation result showed that 5 varieties are different from one another based on the difference between the colors of the flowers. Variety 1 has yellow corolla without honey line and deep pink corona. Variety 2 has light yellow green corolla with strong pink honey line and moderate red corona. Variety 3 has moderate red corolla with moderate red honey line and moderate red corona. Variety 4 has light yellow green corolla with moderate pink honey line and light yellow green corona. Variety 5 has moderate red without honey line and grayish red corona
Highlights
Hoya merupakan tumbuhan epifit yang kebanyakan jenisnya merambat, dari suku Apocynaceae dan anak suku Asclepiadoideae (Rahayu 2012)
Hoya coronaria found in heath forest of Air Anyir
The flowers development process observed from 5 H. coronaria varieties with different color
Summary
Lokasi pengambilan kuncup H. coronaria dilakukan di Hutan Kerangas Air Anyir, Bangka kemudian dipindahkan dan diadaptasikan di rumah percobaan Jalan Fatmawati Raya, Pangkalpinang. Pengamatan terhadap proses pembungaan H. coronaria dilakukan di rumah percobaan yang diletakkan di bawah naungan. Pengamatan pembungaan meliputi jumlah kuncup bunga per tandan, jumlah bunga mekar serta waktu bunga mekar yang meliputi saat dan lama bunga mekar sampai bunga rontok (Rahayu et al 2007). Pengamatan juga dilakukan terhadap warna bunga bagian atas dan bawah dari mulai bunga kuncup, mekar, mekar sempurna dan rontok. Pengamatan dilakukan setiap hari terhadap 5 varietas H. coronaria terpilih dengan jumlah kuncup setiap varietas minimal 1 dan pengukuran diameter kuncup dan panjang tangkai kuncup bunga dilakukan setiap 7 hari sekali. 2. Pengukuran faktor lingkungan Pengukuran faktor lingkungan meliputi pengukuran suhu, kelembaban udara dan intensitas cahaya (Rahayu et al 2007) serta dilakukan pengukuran pH tanah media tanam H. coronaria. Pengukuran suhu udara, kelembaban udara dan intensitas cahaya dilakukan setiap hari pagi pukul 08.00 WIB dan sore pukul 16.00 WIB dengan ulangan sebanyak 3 kali. Sebelum melakukan pengukuran pH meter dikalibrasi terlebih dahulu menggunakan larutan buffer (pH 4 dan 7) (Mindari & Priyadarsini 2011)
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