Paclobutrazol Influences Post Harvest Life of Mango Cvs. Dashehari, Langra, Chausa and Fazri
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Ashok Kumar et al., JPER, 2019, 3:13 Research Article JPER (2019), 3:13 Journal of Plant and Environmental Research (ISSN: 2475-6385) Paclobutrazol influences post harvest life of Mango Cvs. Dashehari, Langra, Chausa and Fazri Ashok Kumar ¹, С.Р. Singh² and Late Sant Ram³ 1.Professor, Uttaranchal college of Agriculture Science, Uttaranchal University, Dehradun-248007, U.K. India.2.Professor, Department of Horticulture, G.B.P.U.A&T- Pant Nagar, U.P., India.3.Professor, Department of Horticulture, G.B.P.U.A&T- Pant Nagar U.K. India ABSTRACT The treatment consisted of different doses of Paclobutrazol *Correspondence to Author: (PP333) namely 1.0g and 0.5g/canopy diameter along with con- Ashok Kumar trol. Paclobutrazol was applied once in a year 15 October 1997 Professor, Uttaranchal college of and 15 September 1998 in soil around the tree canopy spread. Agriculture Science, Uttaranchal Paclobutrazol did not affect on Sugar, pH, Colour, K or glu- University, Dehradun-248007, U.K. cose-fructose ratio, reduced sugar concentration and did not ef- India. fect TSS and Firmness of Apple, increased TSS, Ascorbic Acid, Chlorophyll, ß-carotene, amylase, peroxides activity for 12 days How to cite this article: in Dashehari Mango in storage at ambient temperature (30-33°C), Ashok Kumar, С.Р. Singh and Late chemical used Paclobutrazol [(2RS, 3RS)-1-1(4-Chlorophenyl)-4, Sant Ram. Paclobutrazol influenc- 4-dimethyl-2-(1,2,4-trizol)-1-yl)] Pentan-3-ethanol. es post harvest life of Mango Cvs. Dashehari, Langra, Chausa and Keywords: Paclobutrazol (PBZ), Auxins (IAA), Gibberellins, Cy- Fazri. Journal of Plant and Environ- tokinins and Plant Growth Regulator. mental Research, 2019,3:13 eSciPub LLC, Houston, TX USA. Website: https://escipub.com/ JPER: https://escipub.com/journal-of-plant-and-environmental-research/ 1 Ashok Kumar et al., JPER, 2019, 3:13 Paclobutrazol is a triazoles derivative [(2RS, Forlani, M and Cappola, 1992), Persimmon 3RS)-1-1(4-Chlorophenyl)-4, 4- dimethyl-2- (1, (Lee and Kim, 1991), TSS in Cherry (Looney 2, 4-trizol)-1-yl)] Pentan-3-ethanol. and Mc Killar, 1987), Acidity in Apricot (Mehta Paclobutrazol did not affect on Sugar, pH, et al, 1990) and Grape (Shaltout et al, 1988, colour, K or glucose-fructose ratio in Grape Zoecklein et al,1991, Reynolds et al.. 1992). (Zoecklein et al., 1991). Amino-Cyclo-Propane, Curry and William, 1986, 1986, Elfving et al, Carboxylic Acid, Ethylene, Respiration, Sorbitol, 1987, 1989), Apricot (Subhadrabandhi et al. Fructose, Glucose, Sucrose and Malic Acid in 1990), Banana (El-Otmani et al., 1992), Cherry Apple (Wang and Steffens,1987). Gibberellins (Fateau and Chestnut, 1991), Mango (Kulkanri, and auxins might work together or 1988), Peach (Choi et al, 1988, Chun et al, independently as inhibitors of signals correlated 1990,, Chun and Lee, 1989, 1990), Pear to floral induction in perennial fruit trees. (Embree, 1987, Huang and Shen, 1987; Noma However, only the regular application of et al., 1989) and Plum (Straydom and doney gibberellins inhibits or delaysflowering. borne. 1987) It could not affect acidity in Peach Gibberellins are growth hormones and some of (Choi et al, 1988, Chun et al., Greene, 1986, them are responsible for the elongation of plant Elfving et al, 1987), Citrus (Fucik and Swicilnk, cells (Salisbury & Ross 1994). According to T50), Peach (Erez,1984; Tonutti et al, 1986) Castro Neto (1995), abscisic acid and Strawberry (McArthur and Eaton, 1988 ) concentrations are higher in the floral initiation In contrast Paclobutrazol induced early period than in the vegetative growth period, maturity and ripening in Grape (Reynolds 1989, when abscisic acid competes with gibberellins Reynolds et.al., 1992), Peach (Loreti, 1987, for inhibition of the vegetative growth. The use Martin et al, 1987, Zhang, 1990, George and of plant growth regulators has made it possible Nissan, 1992, Alan et al, 1993) Foliar spray of to change hormonal balance in favor of 2000 and 3000 mg/l PBZ at fruit bud flowering, and these chemical substances have differentiation, increased TSS, Ascorbic Acid, been used to manipulate the vegetative growth Chlorophyll, Carotenoid, Amylase, Peroxides in some species. The challenge, however, is to activity for 12 days in Dashehari Mango, do it without reducing their productive capacity. storage at ambient temperature (Khader, 1990) Paclobutrazol has been used to manage Material and Methods mango tree flowering, causing vegetative The present investigation was carried out at growth to stop and reducing sprout elongation laboratory of department of Horticulture, (Tongumpai 1999).Different responses to College of Agriculture and Horticulture paclobutrazol application are obtained in Research Center, Patharchatta of G.B. Pant mango cultivation, because there are many University of Agriculture and Technology, Pant cultivars grown commercially. Dosage and Nagar, India. application methods also influence the plant Treatment and Layout -The experiment was response to paclobutrazol (Davenport 2007, carried out on uniform trees (21-22 years) of Mouco et al. 2010), as some plants are capable Mango Cvs. Dahshehari, Langra, Chausa and of vegetating longer than others, and thus need Fazri during 1997-99. The treatment consisted higher doses. Sensitivity to paclobutrazol will of different doses of Paclobutrazol (PP333, also depend on climate and plant age and vigor PBZ) namely 1.0g and 0.5g/canopy diameter (Alburquerque et al. 2002) along with controls. Paclobutrazol was applied Paclobutrazol reduced Sugar concentration in once in years, 15 October 1997 and 15 Apple (Greene and Murray, 1983, Greene, September 1998 in soil around the tree canopy 1986, Byun and Chang, 1986, Luo et al, 1990 spread. The uniform size fruits were harvested and Kim, 1991), Grape (William et al., 1989, along with 5 cm stalk length with the help of JPER: https://escipub.com/journal-of-plant-and-environmental-research/ 2 Ashok Kumar et al., JPER, 2019, 3:13 hand Secateurs, harvested fruits were washed respiration in stored mango fruits as compared and kept in Corrugated Fiber Board (CFB) to untreated ones at 33.8°c. Dharkar (1966) boxes in single layer under ambient found extended storage life in Alphonso mango, temperature (30-33°C) for shelf life study of when irradiated with gamma rays. Unripe and Mango Cvs. Dashehari, Langra, Chausa and mature mangoes when irradiated at an Fazri. optimum dose of 25 Krads under air nitrogen or Physio Chemical Analysis:- The observation carbon dioxide nitrogen atmosphere could be on various physio-chemical characters were kept for a long time without much of recorded from 22 June 1998 and 22 July 1999 physiological losses. Singh et al. (1967) and harvested fruits recorded on 10 days of recorded that the weight of Dasehari mango storage in all replication according to the fruits decreased gradually with increasing experiments. The Physiochemical parameters storage period at room temperature. Roy et al. viz. TSS (Total Soluble Solids) were (1980) also obtained similar result in Himsagar determined with help of hand refract meter; and Langra mango fruits during storage. acidity was estimated by titration pulp extract Srivastava (1967) reported that when mango with 0.1 N NaOH using phenolphthalein fruits kept in polyethylene bags with 0.4 per indicators. Total sugar, p-carotene content was cent ventilation caused minimum losses in determined according to method suggested by weight. Garg et al. (1971) reported that the pre Raganna (1992). Physiological loss in weight packaged mango of Dasehari cultivar showed, of fruits the effects of different wrappers and significantly lesser percentage of loss in weight chemicals either alone or in combination of both than those treated with wax emulsion. They on loss in weight of fruits due to physiological further reported that pre packaging plus wax causes during storage have been at varying coating proved to be superior to pre packing or degrees in different fruits. Mango fruits kept in wax coating alone. Garg et al. (1976) found the polyethylene bags showed considerably less minimum loss in weight (4.36percentage) in physiological losses. Cheema et al. (1939) Dasehari mango fruits treated with 2,4, 5-T, investigated the effect of different wrappers on while the maximum weight loss of 5.52 per cent mango fruits. They reported that the wrapping was observed in the fruits treated with cycocel. definitely slowed the ripening process even In Langra and Sundar Prasad mango fruits, after 42 days of storage at 8.8-C and this effect Roy et al (1980) found minimum loss in weight was most marked in fruits wrapped with wax in fruits treated with 52°±1°C hot water + paper. Mustard and Stab (1949) studied the captan (0,5percentage) for 5 minutes. Gaur and effect of' wrappers on transpiration losses, Bajpai (1978) found the minimum loss in weight quality and storage life of fruits and they of litchi fruits which were kept in open basket reported that wrapping materials retarded and maximum in those which were stored in ripening and moisture losses from mangoes polyethylene bags with paper cuttings. Bhullar and avocadoes. Dalai et al. (1962) used wax et al. (1980) recorded the minimum weight loss emulsion for extending the storage life of (7.45percentage) in benlate treated fruits of Sathgudi oranges in an investigation at Kinnow mandarin followed by captan and C.F.T.R.I. aureofungin (8.95percentage). The maximum physiological loss in weight (29.80percentage) The physiological loss in weight during storage was observed in control at the end of storage was found to show delaying effects on the period. Dhuna et al. (1977) and Jawanda et al. reduction of acidity, increase in TSS and (1978) also reported reduction in weight loss by retention of vitamin C. Agnihotri et al. (1963) coating citrus fruits with various chemicals. observed that the waxing retarded deterioration Dhillon et al. (1982) observed a progressive delayed the ripening and reduced the JPER: https://escipub.com/journal-of-plant-and-environmental-research/ 3 Ashok Kumar et al., JPER, 2019, 3:13 decrease in loss in weight of Flordasum peach transportation and transit by spending Rs.