Abstract
Mungbean is one of important sources of vegetable protein in Indonesia. Extensification through the utilization of drylands is very potential to increase mungbean production. The study aimed to find out the response of mungbean given antioxidants of turmeric extract to drought stress. The study was conducted in Kuningan West Java in 2019. The study was designed using a randomized block design with factorial patterns and three replications. The first factor was the concentration of antioxidant of turmeric extract, namely: 0%, 1%, and 1.5%, and the second factor was soil water content namely: field capacity, 75% field capacity, and 50% field capacity. The results showed that the yield of seeds remained high even though mungbean experienced mild stress (75% field capacity) by administering antioxidant of turmeric extract as much as 1% or 1.5%. Likewise, the number of seeds and relative water content of leaves remained high with the same treatment. Meanwhile, plant height, leaf area, and number of pods were increasingly reduced by decreasing the level of soil water content, on the other hand, antioxidants increased the number of filled pods.
Highlights
PENDAHULUAN Kacang hijau termasuk salah satu tanaman legum yang cukup penting dalam rangka pemenuhan gizi masyarakat
Secara umum peningkatan cekaman kekeringan dari kapasitas lapang ke cekaman sedang (50% kapasitas lapang) menurunkan kadar air relatif daun, namun dengan pemberian antioksidan dengan konsentrasi 1%
Pengaruh pemberian antioksidan ekstrak kunyit pada kondisi cekaman kekeringan terhadap bobot biji kering per tanaman (g)
Summary
Akibat radikal bebas, tanaman merespons melalui sistem pertahanan antioksidan (Kleio et al, 2020), baik antioksidan enzim maupun antioksidan non enzim (Mandi et al., 2018; Kleio et al, 2020). Antioksidan endogen yang dihasilkan tanaman tidak cukup untuk mengatasi kerusakan akibat SOR, oleh karena itu perlu ditambahkan antioksidan secara eksogen. Kunyit termasuk salah satu tanaman yang potensial sebagai sumber antioksidan yang dapat menangkal radikal bebas (Borra et al., 2013; Asouri et al, 2013). Sifat antioksidan dari kunyit tersebut dipengaruhi oleh senyawa fenolik yang dikandungnya (Zheng et al., 2017), sedangkan Wahyuningtyas et al (2017) menduga bahwa senyawa kurkumin yang menyebabkan sifat antioksidan tersebut. Dengan demikian ekstrak kunyit berpotensi dapat digunakan untuk mengurangi dampak negatif akibat cekaman kekeringan. Penelitian ini dilakukan dengan tujuan untuk mempelajari respons tanaman kacang hijau yang diberi antioksidan ekstrak kunyit terhadap cekaman kekeringan
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