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Fruiting responses of 'Cardinal' and 'Black Ribier' grapes (Vitis vinifera L.) to gibberellic acid / by Surasak Nilnond

By:

Nilnond, Surasak [author]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : 1981. Cavite State University- Main Campus,Description: 161 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

634.8 N59 1981

Online resources:

Click here to view thesis abstract and table of contents

Abstract: SURASAK NILNOND, University of the Philippines at Los Bafios, January 1981. Fruiting Responses of ferdinal' and "black Ribier! Grapes (Vitis vinifera L.) to Gibberellic Acid. Major Professors: Dr. Ernesto B. Pantastico and Dr. Roberto I, Coronel. Experiments were conducted on ‘Cardinal And Black Ribier grapes (1) to determine the effects of various GA concentrations applied at the prefull and postbloom stapes on various cluster and berry characters, anatomical and physio-chemical. Changes related to the : growth and development of berries, end (2) to determine the economics of GAz application, Cluster length in ‘Cardinal! endBlack Ribier was increased by GAs applied at pre-bloom stage at concentrations from 0.5 to 2 »pm. It was not affected by GA, when applied at full and post-bloom stages in 'Cardinal' but was increased in ‘Black Ribier' by 5 ppm applied at full bloom and 50-100 ppm at post-bloom, The highest GAx concentration applied at pre-bloom (2 ppm) and full bloom (10 ppm) reduced the number of berries per cluster, induced more short berries and cluster loosening resulting in lighter weight of cluster in both varieties. The number of berries and therefore the cluster weight was not, however, significantly affected in ‘Black Ribier’?, Application of 25 - 100 ppm GAz at post-bloon stage increased cell size consequently berry size in both varieties. Berry quality of both varieties was affected by GAs only when applied at the pre-bloom stage. The highest concentration (2 pom) decreased TA in 'Cardinals leading to higher TSS:?TA. On the other hand, 2 ppm GA decreased TSS in 'Block Ribier without affecting TA resulting in s decreased TSS: TA. The respiration rate of both varieties was not affected by CA. application at all growth stages. All treatments at any stage of growth, however, showed high rates of respiration 2 weeks before and/or at harvest. Ethylene production was high during the immature stage of berries but gradually declined up to fruit maturity and gradually increased again before harvest in all treatments. Generally, GAz applications tended to inhibit it. Net profit was increased in both varieties by 25 - 100 ppm GA, applied at post-bloom stage, with 100 and 50 ppm GA. giving the highest net profit 1S 'Cordinalt and ‘'Black Ribier’?, respectively.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	634.8 N59 1981 (Browse shelf(Opens below))		Link to resource	Room use only	T-1421		00002306

Thesis (Ph.D. - - Horticulture) Universty of the Philippines, College, Laguna.

Includes bibliographical references.

SURASAK NILNOND, University of the Philippines at Los Bafios, January 1981. Fruiting Responses of ferdinal' and "black Ribier! Grapes (Vitis vinifera L.) to Gibberellic Acid. Major Professors: Dr. Ernesto B. Pantastico and Dr. Roberto I, Coronel.

Experiments were conducted on ‘Cardinal And Black Ribier grapes (1) to determine the effects of various GA concentrations applied at the prefull and postbloom stapes on various cluster and berry characters, anatomical and physio-chemical. Changes related to the : growth and development of berries, end (2) to determine the economics of GAz application,

Cluster length in ‘Cardinal! endBlack Ribier was increased by GAs applied at pre-bloom stage at concentrations from 0.5 to 2 »pm. It was not affected by GA, when applied at full and post-bloom stages in 'Cardinal' but was increased in ‘Black Ribier' by 5 ppm applied at full bloom and 50-100 ppm at post-bloom,

The highest GAx concentration applied at pre-bloom (2 ppm) and full bloom (10 ppm) reduced the number of berries per cluster, induced more short berries and cluster loosening resulting in lighter weight of cluster in both varieties. The number of berries and therefore the cluster weight was not, however, significantly affected in ‘Black Ribier’?,

Application of 25 - 100 ppm GAz at post-bloon stage increased cell size consequently berry size in both varieties.

Berry quality of both varieties was affected by GAs only when applied at the pre-bloom stage. The highest concentration (2 pom) decreased TA in 'Cardinals leading to higher TSS:?TA. On the other hand, 2 ppm GA decreased TSS in 'Block Ribier without affecting TA resulting in s decreased TSS: TA.

The respiration rate of both varieties was not affected by CA. application at all growth
stages. All treatments at any stage of growth, however, showed high rates of respiration 2 weeks before and/or at harvest.

Ethylene production was high during the immature stage of berries but gradually declined up to fruit maturity and gradually increased again before harvest in all treatments. Generally, GAz applications tended to inhibit it.

Net profit was increased in both varieties by 25 - 100 ppm GA, applied at post-bloom stage, with 100 and 50 ppm GA. giving the highest net profit 1S 'Cordinalt and ‘'Black Ribier’?, respectively.

Submitted to the University Library 01/07/1994 T-1421