Tuber HCN and leaf phenols of 16 Brazilian cassava (Manihot esculenta Crantz) cultivars related to their resistance to bacterial blight

By:

Teles, Francisco Franco Feitosa

Contributor(s):

Material type: Article

ArticleLanguage: English Description: 40(230):383-389Subject(s): Online resources:

Click here to access online

In: Revista Ceres (Brasil)Summary: The hydrocyanic acid (HCN) of tubers, and leaves' total phenols were determined in 16 commercial cassava (Manihot esculenta Crantz) cultivars (8 resistant and 8 susceptible to Xanthomonas campestris pv. manihotis) produced in the State of Minas Gerais, Brazil. The experiment was conducted under a randomized blocks design with four replications. Although there was a general tendency for lower phenol content in the more toxic plants, a regression analysis showed a correlation coefficient of only - 33 percent. The tuber HCN values varied from 0.14 to 0.49 mg/g, and leaves total phenols ranged from 3.04 to 9.50 mg/g. Considerations were made about the possible role of these compounds in providing natural defenses against plant diseases and their relative toxicity when used for human consumption, but neither HCN nor total phenol contents seemed to be responsible for the resistance of cassava to this bacterial disease.

Tags from this library: No tags from this library for this title.

Average rating: 0.0 (0 votes)

Holdings ( 1 )
Title notes ( 1 )

Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Journal Article	CIAT Library Journal Collection	Journal Collection		c.1	Not For Loan (Restricted Access)

Total holds: 0

The hydrocyanic acid (HCN) of tubers, and leaves' total phenols were determined in 16 commercial cassava (Manihot esculenta Crantz) cultivars (8 resistant and 8 susceptible to Xanthomonas campestris pv. manihotis) produced in the State of Minas Gerais, Brazil. The experiment was conducted under a randomized blocks design with four replications. Although there was a general tendency for lower phenol content in the more toxic plants, a regression analysis showed a correlation coefficient of only - 33 percent. The tuber HCN values varied from 0.14 to 0.49 mg/g, and leaves total phenols ranged from 3.04 to 9.50 mg/g. Considerations were made about the possible role of these compounds in providing natural defenses against plant diseases and their relative toxicity when used for human consumption, but neither HCN nor total phenol contents seemed to be responsible for the resistance of cassava to this bacterial disease.