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All Journal Biodiversitas Journal of Biological Diversity
UMA RANI SINNIAH
Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia. Serdang 43400, Malaysia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Characteristics of physiology, phenology, and drought susceptibility index of two varieties of Job’s tears under water deficit stress FIKY YULIANTO WICAKSONO; UMA RANI SINNIAH; RUMINTA RUMINTA; SUMADI SUMADI; TATI NURMALA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 1 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230139

Abstract

Abstract. Wicaksono FY, Sinniah UR, Ruminta, Sumadi, Nurmala T. 2021. Characteristics of physiology, phenology, and drought susceptibility index of two varieties of job’s tears under water deficit stress. Biodiversitas 23: 381-387. Job’s tears or hanjeli (Coix lacryma-jobi L.) is a functional food crop with less popularly cultivated and longer life cycle than paddy and maize, so that it is potentially exposed to drought stress in the dry season in tropical areas. This study aims to evaluate the physiology, phenology, and drought susceptibility index lack of both Job’s tears varieties under water deficit stress. The study was conducted in quantitative method, by using 2 populations of ma-yuen and stenocarpa varieties which were treated with two levels of watering treatment during the vegetative phase (6 to 12 weeks after sowing), i.e. every day watering and every three days watering. Observations were made on physiological traits, phenology, and drought susceptibility index. The results showed that water deficit decreased stomatal conductance and chlorophyll content, but it could increase electrolyte leakage and proline content. Increasing proline content had a significant correlation with crop yields improvement. Flowering time was prolonged as the effect of drought stress in both varieties. Based on drought susceptibility index, stenocarpa was more tolerant than ma-yuen. However, some farmers might still cultivate the ma-yuen due to the soft seed shell character, therefore, this study finding could be used as a basis for developing further plant irrigation techniques for sensitive variety amid a prolonged dry season.
Short Communication: Preharvest drought stress varies grain physical characteristics, milling percentage, and nutritional quality of two Job’s tears varieties FIKY YULIANTO WICAKSONO; TRI WAHYU SUGANDA; RUMINTA RUMINTA; UMA RANI SINNIAH; YUYUN YUWARIAH; TATI NURMALA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 3 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230331

Abstract

Abstract. Wicaksono FY, Suganda TW, Wuminta, Sinniah UR, Yuwariah Y, Nurmala T. 2022. Short Communication: Preharvest drought stress varies grain physical characteristics, milling percentage, and nutritional quality of two Job’s tears varieties. Biodiversitas 23: 1443-1448. Preharvest drought stress is one of the limiting factors that may affect the quality of the harvested yield. This study aimed to evaluate the grain physical characteristics, milling percentage, and nutritional quality of two varieties of Job’s tears (Coix lacryma-jobi L.) in response to preharvest drought stress. Two varieties of Job’s tears were used in the present study, namely ma-yuen (cultivar Watani Wado)and stenocarpa (cultivar Watani Kiara Payung) at Ciparanje research station (6.9164° S, 107.7717° E) from July 2018 (dry season) to January 2019 (rainy season). A water-sufficient condition was achieved by irrigating the plant once a day, while a water-deficient condition was formed by the irrigation every 3 days using a sprinkler system. The results showed that preharvest drought stress caused a significant reduction of seed size in both varieties. However, the stenocarpa was the only one with a significant reduction in milling yield due to its long seed length. In terms of nutritional quality, ma-yuen showed no significant response to preharvest drought, while stenocarpa showeda significant gain in protein and calcium. This finding opened the high potential of stenocarpa variety to be used both as an ornament, just like recent usage, and also functional food.
Co-Authors FIKY YULIANTO WICAKSONO FIKY YULIANTO WICAKSONO RUMINTA RUMINTA RUMINTA RUMINTA SUMADI SUMADI TATI NURMALA TATI NURMALA TRI WAHYU SUGANDA YUYUN YUWARIAH