8
Match List - I with List - II :
Choose the correct answer from the options given below :
|
List - I
Commodity
|
List - II
Effects of ethylene
|
||
|---|---|---|---|
| A | *Daucus carota* *Daucus carota* | I | Toughness Toughness |
| B | *Dianthus caryophyllus* *Dianthus caryophyllus* | II | Isocoumarin formation Isocoumarin formation |
| C | *Asparagus officinalis* *Asparagus officinalis* | III | Russet spotting Russet spotting |
| D | *Lactuca sativa* *Lactuca sativa* | IV | Sleepiness Sleepiness |
EXPLANATION
Storage Systems, Controlled/Modified Atmosphe
- Daucus carota (Carrot) $\rightarrow$ (II) Isocoumarin Formation: Exposure to trace ethylene induces synthesis of the bitter isocoumarin compound (6-methoxymellein).
- Dianthus caryophyllus (Carnation) $\rightarrow$ (IV) Sleepiness: Ethylene induces premature petal inrolling and permanent wilting, a classic disorder known as carnation "sleepiness".
- Asparagus officinalis (Asparagus) $\rightarrow$ (I) Toughness: Ethylene triggers phenylpropanoid enzymes accelerating cell wall lignification and fiber toughening in spears.
- Lactuca sativa (Lettuce) $\rightarrow$ (III) Russet Spotting: Ethylene stimulates polyphenol oxidase and phenylalanine ammonia-lyase, causing brown necrotic sunken pit lesions along midribs.
- Correct Option: Option 1 ((A) - (II), (B) - (IV), (C) - (I), (D) - (III)).
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