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Fruit quality, antioxidant enzymes activity and yield of six cultivars of grapefruit (Citrus paradisi) grown under subtropical conditions

Indian Agricultural Research Journals

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Title Fruit quality, antioxidant enzymes activity and yield of six cultivars of grapefruit (Citrus paradisi) grown under subtropical conditions
 
Creator DUBEY, A K
SRIVASTAV, MANISH
KAUR, CHARANJEET
 
Subject Antioxidant activity, Ascorbic acid, Grapefruit, Sub-tropical, Yield
 
Description Experiment was conducted on six cultivars of grapefruit (Citrus paradisi Macf.) namely, Imperial, Duncan, Foster, Marsh SL, Star Ruby and Redblush during 2009-2011. Plants of these cultivars were spaced at 4 m × 4 m apart. Fruit yield was found to be the highest (31.48 kg/tree) in Imperial followed by Foster (23.43 kg/tree). However, heaviest fruit (414.01 g) was recorded in Foster and the lowest fruit weight (282.89 g) was in Redblush. Duncan and Marsh SL had the highest juice recovery (50.00%) which was not differed significantly with Redblush (46.91%). The lowest juice recovery was found in Foster and Imperial. Imperial had thickest peel (6.99 mm) and peelthickness was least in Foster (5.30 mm). Whereas, seeds/fruit was recorded the highest in Foster and Imperial (> 44 seeds/fruit). Other cultivars like, Marsh SL, Star Ruby and Redblush had less than 5 seeds/fruit and seems to be seedless. Mean TSS was recorded maximum in Duncan (9.56%) which was at par with Marsh SL (9.53%) and Redblush (9.50%). The minmum TSS was found in Star Ruby (8.82%) which did not differ significantly with Foster. Significantly lower acidity was recorded in Marsh SL (0.81%), Imperial (0.85%) and Foster (0.94%). While maximum acidity was found in Duncan (1.09%). The higher ascorbic acid content (56.53 mg/100 ml juice) was estimated in Marsh SL followed by Foster (49.61 mg/100 ml juice). Whereas, maximum AOX activity (5.56 µ mol Trolox eq/g ) was recorded in Imperial followed by Marsh SL (5.08 µ mol Trolox eq/ g) and Redblush (4.53 µ mol Trolox eq/g). The most promising grapefruit cultivars, based on yield and quality, were Marsh SL, Redblush and Imperial.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-08-08
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/31988
 
Source The Indian Journal of Agricultural Sciences; Vol 83, No 8 (2013)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/31988/14336
 
Rights Copyright (c) 2014 The Indian Journal of Agricultural Sciences