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Anti-transpirants as water stress protection in coffee (Coffee sp., L.) seedlings / by Reynaldo Caniya Ersando.

By:

Ersando, Reynaldo Caniya [author]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : University of the Philippines, 1979.Description: 71 pages: illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

633.73 Er8a 1979

Online resources:

Click here to view thesis abstract and table of contents

Abstract: Ersando, Reynaldo C., University of the Philippines at Los Banos, March, 1979. Anti-transpirants as Water Stress Protection in Coffee (Coffea sp., L.) Seedlings. Major Professor: Dr. Rafael P. Creencia. An experiment on coffee seedlings using ‘Excelsa' variety was conducted to (i) determine the effects of anti-transpirants on the water status of coffee seedlings at varying storage periods in preparation for transport and (2) determine the effects of antitranspirants on the water status, survival, growth, transpiration and chlorophyll content of transplanted uprooted coffee seedlings. The anti~transpirants used were spruce seal, atrazine, phenyl mercuric acetate (PMA) and corn oil at varying concentrations. The study consisted of two experiments. Experiment consisted of storing the seedlings in the laboratory and Experiment II was a field trial performed at the Experiment Station, Plantation Crops Division, Department of Horticulture. Spruce seal and corn oil effectively conserved the original relative water content (RWC) at 5 days storage period compared to atrazine and PMA. After 15 days of storage, 1.5% spruce seal, 20 ppm atraZine, 107? M PMA and 2.0% corn oil were the ones effective in conserving the original RWC which also resulted in better retention of leaves. The original RVC on the transplanted uprooted coffee seedlings was better conserved with the use of 2.0% spruce seal, 20 ppm atrazine, 107” M PMA and 2.03 corn oil. Uprooted seedlings treated or untreated with anti-transpirants exhibited a 25 - 403 mortality rate. No mortality was found in the control. The number of leaves was significantly affected by uprooting rather than the use of anti-transpirants. Width and length of leaves in the transplanted uprooted seedlings was insignificantly different from the anti-transpirant- treated plants. Likewise, an insignificant difference was observed in the chlorophyll content between the uprooted seedlings and the control. No significant differences on transpirational water loss was observed in all the treatments at the end of the experiment.

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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	633.73 Er8a 1979 (Browse shelf(Opens below))		Link to resource	Room use only	T-1113		00002137

Thesis (M.S. - - Horticulture) University of the Philippines, College, Laguna.

Includes bibliographical references.

Ersando, Reynaldo C., University of the Philippines at Los Banos, March, 1979. Anti-transpirants as Water Stress Protection in Coffee (Coffea sp., L.) Seedlings. Major Professor: Dr. Rafael P. Creencia.

An experiment on coffee seedlings using ‘Excelsa' variety was conducted to (i) determine the effects of anti-transpirants on the water status of coffee seedlings at varying storage periods in preparation for transport and (2) determine the effects of antitranspirants on the water status, survival, growth, transpiration and chlorophyll content of transplanted uprooted coffee seedlings. The anti~transpirants used were spruce seal, atrazine, phenyl mercuric acetate (PMA) and corn oil at varying concentrations.

The study consisted of two experiments. Experiment consisted of storing the seedlings in the laboratory and Experiment II was a field trial performed at the Experiment Station, Plantation Crops Division, Department of Horticulture.

Spruce seal and corn oil effectively conserved the original relative water content (RWC) at 5 days storage period compared to atrazine and PMA. After 15 days of storage, 1.5% spruce seal, 20 ppm atraZine, 107? M PMA and 2.0% corn oil were the ones effective in conserving the original RWC which also resulted in better retention of leaves.

The original RVC on the transplanted uprooted coffee seedlings was better conserved with the use of 2.0% spruce seal, 20 ppm atrazine, 107” M PMA and 2.03
corn oil. Uprooted seedlings treated or untreated with anti-transpirants exhibited a 25 - 403 mortality rate. No mortality was found in the control. The number of leaves was significantly affected by uprooting rather than the use of anti-transpirants. Width and length of leaves in the transplanted uprooted seedlings was insignificantly different from the anti-transpirant- treated plants. Likewise, an insignificant difference was observed in the chlorophyll content between the uprooted seedlings and the control. No significant differences on transpirational water loss was observed in all the treatments at the end of the experiment.

Submitted to the University Library April 10, 1989 T-1113