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Sweet gourd (Momordica cochinchinensis)
This document provides information about Momordica cochinchinensis (sweet gourd). It discusses the origin, botany, nutritional value, health benefits, cultivation practices, breeding objectives, and research on propagating it in vitro. Specifically, it explores sterilizing seeds both with and without their dense coats to initiate growth in liquid and solid media. Within 16 days of cultivation, cotyledons opened and roots formed intensely, showing potential for micropropagation of this valuable crop with low germination rates.
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Sweet gourd (Momordica cochinchinensis)
- 1. SWEET GOURD/GAC FRUIT/REDMELON • Momordica cochinchinensis • Cucurbitaceae Submitted by S.ADHIYAMAAN (2017603401) I-M.Sc.VEGETABLE SCIENCE DEPT. OF VEGETABLE CROPS HC & RI, TNAU, CBE.- 641 003
- 2. Origin - SoutheastAsia • Distribution Southeast Asian fruit mainly found throughout the region from Southern China to Northeastern Australia, including Thailand, Laos, Myanmar, Cambodia and Vietnam
- 3. Botany • Dioecious, perennialclimber.2n=28 • Stem glabrous,leaves sub-orbicular, 5 lobed flower white or pale yellow black at base inside • Male flower: peduncle 5-30cm long,sub-arbicular,s sessile bract3-4cm • Female flower: smaller bracts • Fruits ovoid,10-15 cm long,pointed densely aculeate turning red at maturity. • seed ovoid 26-28mm long,compressed,sculptured
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- 5. Accession no. Total carotenoids (µg/g) ß-carotene (µg/g) % of ß-carotene to Total carotenoids (%) IC553689 810 139.60 16.7 IC 553690 832 141.17 16.9 IC 553691 716 133.28 18.5 Carotenoids content of Indian accessions sweet gourd • Sweet gourd aril also contain 22% fatty acids by weight which are essential for absorption and transport of β carotene • Oil extracted from aril also showed 2710 µg β carotene and also included high levels of vitamin E • It has β carotene and lycopene at high levels
- 6. • High Nutritionalvalue • Tender fruits& younger leaves edible • High protein,Vit-C &Vit-A • Seeds treat swelling, abscesses, ulcer • Tuber hemolytic fraction • Fruits /leaves external application for lumbago,ulceration & fracture of bone • Roots-triterpenoid –saponin, sterol(bessisterol) • Fresh root- bisdesmoside • Dry root - monodesmoside
- 7. β carotene (µg/g)Lycopene (µg/g)
- 8. Health Benefits ofGac 1- Gac fruit combats cancer 2- It fights anemia 3- It helps lower cholesterol levels 4- Gac fruit prevents cardiovascular diseases 5- It improves eyesight 6- It combats depression 7- Gac fruit maintains youth and prevents aging
- 9. Anthesis • Male flrbud: 22-24 days to full bloom • Anthesis dehiscence : 6.20 am /6.50 male • Female Flr: 19-22 days to bloom @ 5.50 AM • Stigma receptivity:18h before and after anthesis (12h b/a peak) • Pollen viability 36 hrs • Flowering node: 9-28, 1-13, and 1 on primary, secondary and tertiary respectively • Sex ratio :1:1 • Last week Aug- Ist week of sep peak flowering respectively • Planting to flowering: 39 and 43 days for male and female respectively • Bud break: 36&33 min female and male • Anthesi between 06.30h and 08.00 to09.00h • Fruit set: 14.72% and its highest at 22.89% in mid August
- 10. • Warm humidclimate • 25-35◦c 1500-2500mmRF, • during winter dormant,spring sprout • Sandy loam pH 6.5-7.0 • Planting: Feb- Mar Irrigated condition and June-July for rainy season • Basin : (45 X 45) cm, 45-50 days old seedlings • NPK: 100-120: 60: 50kg/ha +10-12 t FYM Cultivation
- 11. Propagation • Seed,Tubers &cutting • Seed: 3-5 kg, longer period (3-5 years, low germination (50%),48.7% female and 51.3% male • Tubers: 50,000 sprouted tubers/ha, selected from 2-3 year old plants,25- 30g wt, 2 bud /each piece but 40g piece is the best • Stem cuttings: 2 nodes/cutting,treat 200-500ppm IBA,July-Aug, when 4-5 leaves –main field
- 12. Traditionally used forwound healing, to improve eye health and to promote normal growth in children. The seeds have resolvent and cooling properties, are used for treating liver and spleen disorders, chest complaints, abdominal pains and dysentery, wounds, hemorrhoids, swelling, and pus. Sweet gourd products 1. Xoi gac (Glutinous rice + sweet gourd aril) 2. Gac capsule 3. Gac oil 4. Gac powder 5. Health drink (Gac juice blended with Rosa roxburgii and Lycium barbarum) Xoi gac
- 13. Distinguishing characters inperennial dioecious Momordica spp. Character Spine gourd Teasle gourd Sweet gourd Anthesis Evening (6-7 pm) Morning (4-6 am) Morning (7-8 am) Individual fruit weight 5-20 g 60-100 g 500-900 g Glands in petiole Absent Absent Present Bulls eye nectar guides at the base of the petal Absent Present Present Flowering very late, i.e. 90–100 days after planting. Usually anthesis takes place in the early morning hours
- 14. Leaf of M.cochinchinensis with umbilical glands
- 15. Flowers of dioeciousMomordica (a) M. dioica, (b) M. cochinchinensis (c) M. subangulata subsp. renigera (Bharathi et al., 2011)
- 16. (a) M. dioica (b)M. subangulata subsp. renigera (c) M. cochinchinensis (Bharathi et al., 2011) Seeds of dioecious Momordica
- 17. Fruits of perennialdioecious Momordica species (from left to right): 1. M. cochinchinensis; 2. M. subangulata subsp. renigera; 3. M. dioica (Bharathi et al., 2014)
- 18. Fruit, seed andleaf morphology of M. cochinchinensis A–C Spike density of fruits categorized as dense (A), medium (B) and sparse (C). D. Fruit shapes categorized as round (globose), globose-oval (centre) or tapered (right). E. Colour and size variations of mature seeds categorized as black- large (left), dark brown- large (centre), light brown- small (right). F–G. Leaf differences between five (F) and three lobes (G). Diversity of M. cochinchinenesis in Vietnam & Thailand (Wimalasiri et al., 2016)
- 19. Breeding Objectives • Yield •Quality • Earliness • Pest and disease resistance: Development of varieties resistant to diseases - Fusarium wilt, anthracnose, powdery mildew, downy mildew, and Insect pests- root knot nematode, red pumpkin beetle, ladybird beetle, fruit fly and fruit borer. • Stress resistance: Environmental factors like high and low temperature, drought, excessive moisture, salinity, alkalinity, etc.
- 20. Inter-specific hybridization • Reportsof inter-specific hybridisation between M. dioica and M. cochinchinensis (Mohanty et al. 1994; Mondal et al. 2006), • M. charantia and M. dioica (Roy et al. 1966; Dutt and Pandey 1983; Vahab and Peter 1983; Anon. 2004), • M. balsamina and M. dioica (Roy et al. 1966) and among the species of Indian occurrence (Bharathi et al. 2012).
- 21. However, the • poorgermination of F1 seeds, • unsatisfactory growth and flowering in F1 seedlings, and • partial to complete sterility in F1 indicate the rather limited potential of interspecific hybrids from these species in conventional crop improvement. • In many cases, this sterility was associated with meiotic abnormalities.
- 22. Propagation and cultivationof Gac fruit • The plant can be cultivated from seeds or root tubers, and grows as dioecious vines (separate male and female plants). • Rooted vine cuttings can also be used for propagation and are more reliable than production from seeds, which can be affected by dormancy and a long lead time into production.
- 23. Variety: Teasel Gourd ArkaNeelachal Gaurav • Developed through clonal selection at CHES, Bhubaneswar. • Plants vigorous with dark-green foliage, strong vine and fairly long growing period (15 June–15 October). • Dark-green and oval fruits along with small spines. • Fruits 6.0 cm long, 3.8 cm thick. • Average weight 50 g. • Plant produces 230–250 fruits in full cropping season with assured pollination. • Needs hand pollination for assured yield (12-15 kg/ plant per season). • Produces large numbers of female flowers. • Shows moderate resistance to pumpkin caterpillar infestation, and moderate susceptibility to anthracnose and downy mildew diseases in the field.
- 24. Yield • 10-12 daysafter anthesis to harvest the fruits • 1.5-1.8 ton/ha (3-5kg/plant) • Preservation: slice it, blanch 1kg slice in 3 l of lactic acid (pH3,5), 4mints ,82◦c • Slice-dried in sun- kept in closed containers
- 25. • Genetic resources& Improvement • ICAR Research complex for NEH Barapani, • IIVR Varanasi : 20 genotypes • Acc from Assam reveals that C-8 & C20 early var & yield potential
- 26. • Handique 1988:In sweet gourd and teasel gourd the young and developing seed coat is whitish, soft and delicate but subsequently it turns ash coloured to black and hard, which is a major drawback. Development of parthenocarpic fruit will greatly enhance its food value and consumer acceptability. • Treatment with α-NAA 100 ppm induced parthenocarpic development up to 95 % in teasel gourd. Sanwal et al. (2011): • Application of 500 mg/l AgNO3 on female plants produced the maximum proportion of induced hermaphrodite flowers in M. cochinchinensis and the pollen viability was similar to that of normal male plant. Use of PGRs for sex alteration
- 27. 1. Bhat KL.2001. Minor Vegetables - Untapped Potential. Kalyani. 2. lndira P & Peter KV. 1984. Unexploited Tropical Vegetables. Kerala Agricultural University,Kerala. 3. Peter KV. (Ed.). 2007-08. Underutilized and Underexploited Horticultural Crops. Vols. I-IV. New India Publ. Agency. 4. Rubatzky VE & Yamaguchi M. (Eds.). 1997. World Vegetables: Principles, Production and Nutritive Values. Chapman & Hall. 5. Srivastava U, Mahajan RK, Gangopadyay KK, Singh M & Dhillon BS. 2001. Minimal Descriptors of Agri-Horticultural Crops. Part-II: Vegetable Crops. NBPGR, New Delhi. 6.https://www.echocommunity.org/en/. References
- 28. Research articles • 2.invitro.pptx
- 29. Momordica Cochinchinensis (Lour.)Spreng. (Cucurbitaceae) in Culture In Vitro. Valeriy К. Tokhtar1*, Zhang Doang2, Liudmila А. Tokhtar1, Oleg I. Korotkov 3, and Galina I. Safronova4. 1 Belgorod State University, Pobedy St. 85, Russia, Belgorod, 308015. 2 Hanoi University, Km 9 Nguyen Trai - Thanh Xuan, Hanoi, Vietnam 3 Nikitskiy Botanical Garden, Nikita settlement, Republic of Crimea, Yalta, Russia 298648, 4 Volgograd Regional Botanical Garden, Metallurgov settlement, 68, Volgograd, Russia 400007
- 30. INTRODUCTION • Sweet gourdedible parts: leaves, fruits, caules and seeds • Folk medicine - hypoglycemic effect (harantin, insulin-like peptides and alkaloids) • Valuable oil from the seeds (rich for α-eleostearic acid) • Problem of low germination capacity (a very strong woody seed coat)
- 31. MATERIALS AND METHODS •Two types of primary explants: 1.The seeds with dense seed coat (with damage of the coat in micropyle zone) – Liquid medium 2.The seeds without seed coat. –Solid medium Sterilization of explants: the seeds, soaked in 96% ethanol solution, were burned in a flame of alcohol burner for not more than a minute, and then they were sterilized in lysoformin solutions of different concentrations: 10% (7 min.), 10% (10 min.), 7% (10 min.), 7% (15 min.)
- 32. RESULTS AND DISCUSSION Theresults of sterilization of Momordica cochinchinensis Spreng explants. • On the thirteenth day of cultivation, the cotyledons opened. • Sixteen days of cultivation, intensive root formation • 47th day- transplanting to main field
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