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Yellowing in rice plants caused by pathogens and nutrient deficiencies / by Ester G. Paunlagui

By:

Paunlagui, Ester G [author]

Contributor(s):

Pantastico, Eduvigis B [adviser]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : University of the Philippines, 1977.Description: 140 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

633.18 P28 1977

Online resources:

Click here to view thesis abstract and table of contents

Abstract: PAUNLAGUI, ESTER G., University of the Philippines at Los Banos, March 1977, Yellowing in Rice Plants Caused by Pathogens and Nutrient Deficiencies, Major Professor: Dr. Eduvigis B. Pantastico. Three cultivars namely, IR-8, C4-53G and BPI-76 were grown in R.S.-17 culture solution under four levels of N, P, K, Ca and Mg to determine growth, soluble nutrients, chlorophyll content and percentage leaf infection of diseased plants. It was observed that the root growth of phosphorous-deficient plants was highest followed by K, control, N, Mg and calcium deficient plants. The chlorophyll content of plants was highest in control followed by P-deficient, K, Ca, Mg and N-deficient plants. The highest NO.~content was obtained in K-deficient while the highest K-content was obtained in Mg and Ca-deficient plants. It was also noted that the highest P and Ca-content was obtained in Ca-deficient plants and P-deficient plants respectively. Tungro diseased plants had high chlorophyll content than the blast-diseased. The percentage leaf infection was high in tungro-diseased plants. The three varieties exhibited different responses depending on the levels of nutrients. The higher the concentration of N P and K, the higher the percentage leaf infection. It was also noted that the higher the Mg and Ca-content of the solution, the lower the percentage leaf infection. The 3 varieties showed resistance to blast and susceptibility to tungro virus under greenhouse condition.

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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	633.18 P28 1977 (Browse shelf(Opens below))		Link to resource	Room use only	T-1125		00002148

Thesis (M.S. - - Botany-Plant Physiology) University of the Philippines, College, Laguna.

Includes bibliographical references.

PAUNLAGUI, ESTER G., University of the Philippines at Los Banos, March 1977, Yellowing in Rice Plants Caused by Pathogens and Nutrient Deficiencies, Major Professor: Dr. Eduvigis B. Pantastico.

Three cultivars namely, IR-8, C4-53G and BPI-76 were grown in R.S.-17 culture solution under four levels of N, P, K, Ca and Mg to determine growth, soluble nutrients, chlorophyll content and percentage leaf infection of diseased plants.

It was observed that the root growth of phosphorous-deficient plants was highest followed by K, control, N, Mg and calcium deficient plants.

The chlorophyll content of plants was highest in control followed by P-deficient, K, Ca, Mg and N-deficient plants.

The highest NO.~content was obtained in K-deficient while the highest K-content was obtained in Mg and Ca-deficient plants. It was also noted that the highest P and Ca-content was obtained in Ca-deficient plants and P-deficient plants respectively.

Tungro diseased plants had high chlorophyll content than the blast-diseased.

The percentage leaf infection was high in tungro-diseased plants. The three varieties exhibited different responses depending on the levels of nutrients. The higher the concentration of N P and K, the higher the percentage leaf infection. It was also noted that the higher the Mg and Ca-content of the solution, the lower the percentage leaf infection. The 3 varieties showed resistance to blast and susceptibility to tungro virus under greenhouse condition.

Submitted to the University Library April 29, 1988 T-1125