Application of hexanal for quality retention and shelf life extension of fruits and vegetables

2. Ziaullah Sulaimankhil
Roll No. 21058
M. Sc. 2nd Year
2019
Division of Food Science & Postharvest Technology

4. DEFINITION OF HEXANAL(C6H12O)
•hexanal is a volatile compound
possessing antimicrobial activity against
plant pathogens. it can be applied as
pre-harvest sprays or as a post-harvest
vapour and dip treatment.

5. • ACTION MECHANISM
Denatures
microbial proteins
Alternation of the
membrane fatty
acid
Leakage of metabolites
and ions
Membrane permeability
increases

6. Phytotoxicity
Off-flavour
Peel discoloration
Increase shelf life
Reduce decay
Easy application
Low cost

7. Hexanal
Decay
control
Astrigency
removal
Improve
quality
Maintain
firmness
Enhance
postharvest
shelf life
Sprout
inhibitors
Uses

9. Agriculture and Agr i-Food
Song et al., 2010
Effect of hexanal vapor to control postharvest decay
and extend shelf-life of highbush blueberry fruit during
controlled atmosphere storage
Case 1

10. Application of hexanal vapor can reduce
fruit decay, maintain fruit quality and
extend storage life
highbush blueberry fruit (Vaccinium corymbosum )
Hexanal vapor at 0.9 ml
For 24 h , before and after 1 and 2 wk of CA storage at
0.5°C for. Fruit removed after 3, 5, 7, 9, 12 and 15 wk
Decayed reduced by 50-70% .
Marketable fruit was 20-40% greater in12 wk as
compared to controls.

11. Inferences
Hexanal treatment reduced the decayed by 50-70% .
Marketable fruit was 20-40% greater in12 wk as
compared to controls

12. Hexanal and 1-MCP treatment enhancing
the shelf life and quality of sweet cherry
• Sharma et al (2010)
• Scientia Horticulturae
Case II

13. Pre-Harvest: Hexanal (Enhanced Freshness
Formulation)
Result :after 30 day had better Colour , Brightness and
Firmness than unspryed hexanal and storage at 4°C .
Post-Harvest :Hexanal Vapour and 1-MCP application
Result : higher level of Superoxide dismutase ,
Ascorbate proxidase activity.
The level of anthocyanin, and phenolic compound
increased.

14. Inferences
Over all : The pre-harvest EFF and Post-harvest of
Hexanal Vapour , 1-MCP and combination
application increase the shelf life of Sweet Cherry.

15. Gill et al., 2016
Postharvest Biology and Technology
Case 3

16. To evaluate the effect of hexanal containing aqueous formulation on
shelf life enhancement and quality of guava cv. Allahabad safeda
Aqueous hexanal formulation (1%, 1.5% and 2%)
Calcium nitrate (1%, 2%, 4%)
Spray @ 10 l/ tree (knapsack sprayer)
Spray 2 week before harvest
Storage at 6-8 °C, 90-95%
Materials

17. The effect of pre-harvest application of the Enhanced Freshness Formulation
(1.5% of hexanal) on the appearance of guava fruit (A); before harvest B); before
14 d and (C); 28 d of cold storage as compared to the fruit from control trees

18. Inferences
The guava fruit treated with pre-harvest sprays of EFF (1.5%
hexanal) 2 weeks before harvest most efficiently retained the fruit
quality attributes up to 28 d during cold storage at 6–8 °C and 90–
95% RH
Treated fruits had significantly higher pectin content (1.5%), on 28th
days of storage, which is 65% more than the control
Control guava have 57% lesser fruit firmness as compared to the
treated guava on 28th day

19. Conclusion
Hexanal treatment increased the transcript levels of four annexins and
three calmodulin-binding transcription activators and PLD during
raspberry postharvest storage
The guava fruit treated with pre-harvest sprays of EFF (1.5% hexanal)
2 weeks before harvest efficiently retained the fruit quality attributes
up to 28 days

20. Volatile
compounds
Crops Effect on plant References
Hexanal Mango Pre-harvest sprays of hexanal formulation
for extending retention and shelf-life of
mango (Mangifera indica L.) fruits
Anusuya et
al., 2016
Hexanal Tomato Improving quality of greenhouse tomato
(Solanum lycopersicum L.) by pre- and
postharvest applications of hexanal-
containing formulations
Cheema et al.,
2014
Hexanal Mango Post-harvest treatments for extension of
mango fruit var. Dashehari (Mangifera
indica L.)
Thakur et al.,
2017
Effects of hexanal on