Change of chlorophyll content in diseased leaves of rice plants affected by downy mildew

Shigeyasu AKAI; Masao FUKUTOMI

doi:10.3186/jjphytopath.23.85

Shigeyasu AKAI, Masao FUKUTOMI

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JOURNAL FREE ACCESS

1958 Volume 23 Issue 2 Pages 85-89

DOI https://doi.org/10.3186/jjphytopath.23.85

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Published: 1958 Received: - Available on J-STAGE: February 19, 2009 Accepted: May 21, 1958 Advance online publication: - Revised: -
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Date of correction: February 19, 2009 Reason for correction: - Correction: TITLE Details: [in Japanese]

Date of correction: February 19, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : In the present paper the writers reported the results of investigations conducted on the change of chlorophyll content in the leaves of rice plants affected by downy mildew.
The contents of protochlorophyll, chlorophyll a and chlorophyll b were measured from the diseased and healthy leaf samples. In the healthy leaves they decreased with the descending order of the leaf arrangement, and in the diseased leaves they increased. The difference in chlorophyll content between the healthy and diseased leaves was detected more markedly in the newly developed leaves, but was rather obscure in the lower leaves. The ratio of three components of chlorophyll was nearly alike in both the healthy leaves and diseased leaves.
The distribution of the wave-length absorption of the ether-extract of chlorophyll did not change with the incidence of the disease nor with the order of leaf arrangement.
By the time the diseased rice leaves have developed to maturity, the hyphal vesicle of the causal fungus, which is rich in plasma, is changed into oogonium. In Digitaria adscendens, however, the diseased leaves may have considerable hyphae and hyphal vesicles even after forty or fifty days after the maturity of the leaves. In such leaves, the chlorophyll content also increased as in the case of lower leaves of rice plants. The lower content of chlorophyll in the upper leaves seems not to be attributable to decomposition as caused by the metabolites secreted by the hyphae of the causal fungus.
Right : In the present paper the writers reported the results of investigations conducted on the change of chlorophyll content in the leaves of rice plants affected by downy mildew.
The contents of protochlorophyll, chlorophyll a and chlorophyll b were measured from the diseased and healthy leaf samples. In the healthy leaves they decreased with the descending order of the leaf arrangement, and in the diseased leaves they increased. The difference in chlorophyll content between the healthy and diseased leaves was detected more markedly in the newly developed leaves, but was rather obscure in the lower leaves. The ratio of three components of chlorophyll was nearly alike in both the healthy leaves and diseased leaves.
The distribution of the wave-length absorption of the ether-extract of chlorophyll did not change with the incidence of the disease nor with the order of leaf arrangement.
By the time the diseased rice leaves have developed to maturity, the hyphal vesicle of the causal fungus, which is rich in plasma, is changed into oogonium. In Digitaria adscendens, however, the diseased leaves may have considerable hyphae and hyphal vesicles even after forty or fifty days after the maturity of the leaves. In such leaves, the chlorophyll content also increased as in the case of lower leaves of rice plants. The lower content of chlorophyll in the upper leaves seems not to be attributable to decomposition as caused by the metabolites secreted by the hyphae of the causal fungus.

Date of correction: February 19, 2009 Reason for correction: - Correction: DTPUB Details: Wrong : 19580730

Date of correction: February 19, 2009 Reason for correction: - Correction: AUTHOR Details: Wrong : Shigeyasu AKAI, Masao FUKUTOMI¹⁾
Right : Shigeyasu AKAI¹⁾, Masao FUKUTOMI¹⁾

Date of correction: February 19, 2009 Reason for correction: - Correction: AFFILIATION Details: Wrong :
1) Laboratory of Phytopathology. College of Agriculture, Kyoto University

Right :
1) Laboratory of Phytopathology, College of Agriculture, Kyoto University

Date of correction: February 19, 2009 Reason for correction: - Correction: CITATION Details: Wrong : 1) Bonner, J.: Plant Biochemistry. (1950).
2) Koski, V. M.: Arch. Bioch. Bioph., 29: 339-343. (1950).
3) Koski, V. M., C. S. French, and J. H. C. Smith: Arch. Bioch. Bioph., 31: 1-17. (1951).
4) Randolph, L. F.: Bot. Gaz., 73(5): 337-375. (1922).

Right : 1) Bonner, J.: Plant Biochemistry. (1950).
2) Koski, V.M.: Arch. Bioch. Bioph., 29: 339-343. (1950).
3) Koski, V.M., C.S. French, and J.H.C. Smith: Arch. Bioch. Bioph., 31: 1-17. (1951).
4) Randolph, L.F.: Bot. Gaz., 73 (5): 337-375. (1922).

Date of correction: February 19, 2009 Reason for correction: - Correction: PDF FILE Details: -

Abstract

In the present paper the writers reported the results of investigations conducted on the change of chlorophyll content in the leaves of rice plants affected by downy mildew.
The contents of protochlorophyll, chlorophyll a and chlorophyll b were measured from the diseased and healthy leaf samples. In the healthy leaves they decreased with the descending order of the leaf arrangement, and in the diseased leaves they increased. The difference in chlorophyll content between the healthy and diseased leaves was detected more markedly in the newly developed leaves, but was rather obscure in the lower leaves. The ratio of three components of chlorophyll was nearly alike in both the healthy leaves and diseased leaves.
The distribution of the wave-length absorption of the ether-extract of chlorophyll did not change with the incidence of the disease nor with the order of leaf arrangement.
By the time the diseased rice leaves have developed to maturity, the hyphal vesicle of the causal fungus, which is rich in plasma, is changed into oogonium. In Digitaria adscendens, however, the diseased leaves may have considerable hyphae and hyphal vesicles even after forty or fifty days after the maturity of the leaves. In such leaves, the chlorophyll content also increased as in the case of lower leaves of rice plants. The lower content of chlorophyll in the upper leaves seems not to be attributable to decomposition as caused by the metabolites secreted by the hyphae of the causal fungus.

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