บทบาทของฮอร์โมน Jasmonates และ abscisic acid ต่อพัฒนาการทางสรีรวิทยาของผลมะม่วง (Mangifera indica L.)

Physiological Roles of Jasmolonates and Abscisie Acid on Fruit Developnment 0f Mango (Mangiferaindica 1.)

Name: เกศินี สังข์คำ

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Mango

; Fruit Development

; Jasmonic Acid (JA)

; Melhyl Ja.smonatc(McJA)

; Abscisic Acid (ABA)

; Water Stress

Abstract: Jasmonales (jasmonic aied (JA) and methyl jasmonatc (McJA)) cis and trans- abscisic acid(ABA) and its metabolites, phaseic acid (PA), dihydsophaseic acid (DPA) and its epimer(epi-DPA) levels associated with fruit development and ripening in early harvest 'Nam DokMai' and late harvest 'Nang Klangwan' mango fruits were investigated in skin, pulp andseed or fruit. Changes in carbon dioxide and 1 aminocyclopropane -1-carboxylic acid(ACC) content were also examined. CO2 production and JA level were highest at thebeginning of fruit development due to cell division. In skin and pulp, the reaching peak ofAIM, PA, DPA and epi-DPA levels preceded the increases in ACC,JA and MeJA levels atmaturity stage and also prior the decrease of skin color and fruit firmness. Thesc suggestthat ABA induced the ACC, jasmonates synthesis and the maturity of mangoes. In seed, JA,ABA and its metabolites declinced toward harvest, suggesting a lack of seed dormaucy.DPA or epi-I) PA was considered to be predominant metabolites 0f ABA because theirlevels were more than half of ABA Ievrl. It indicates that PA-DPA pathway is a mainpathway of ABA metabolism ol' mangoes. The content ACC and JA were differencebetween skin, pulp and cultivars hence JA and ACC play different roles of ripening peocess.fruit were harvested at prcclimaeteric and climacteric stages in both cultivars and thenfruit were stored in low humidity. The amount of JA, McJA and ACC in skin and pulpaccumulated throughout the devcelopment. CO2 production, firmness and skin hue angledecreased with day in storage. 1n addition, the increased in JA level correlated withweight of fruit. This suggests that JA accumulation that occurs during hit senescence isassociated with moisture loss. n-propyl dihydro jasmonate (PDJ) applied to preclimaclericand climacteric 'Nan Dok Mai' mango during on tree had n0 influcnec on ABA and itsmetabolitcs Ievels. However, treated fruit promoled pigmentalion and reduced loss offirmness. This result supported a role of jasmonates as an inducer of ripcening in 'NamDok Mai' mango.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: Prof.Dr. Satoru Kondo

Role: Supervisor

Created: 2546

Issued: 2005-10-17

Modified: 2006-05-10

วิทยานิพนธ์/Thesis

ISBN: 9741834454

CallNumber: PHT171

tha

DegreeName: Master of Science

Level: Master's Degree

Descipline: Postharvest Technology

Grantor: King Mongkut's University of Technology Thonburi

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