A New stem-splitting symptom in safflower caused by macrophomina phaseolina

Govindappa, M. and Lokesh, S. and Ravishankar Rai, V. (2005) A New stem-splitting symptom in safflower caused by macrophomina phaseolina. Journal of Phytopathology, 153 (9). pp. 560-561. ISSN 1439-0434

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Official URL: https://doi.org/10.1111/j.1439-0434.2005.01011.x

Abstract

Abstract Safflower is known to be attacked by several seed-borne fungi, of which Macrophomina phaseolina is one of the most important pathogens causing serious yield losses. During routine experiments, a new stem-split symptom was observed in M. phaseolina-infected plants resulting in poor growth and reduced size of inflorescences. Stem-split was observed in 30-day-old plants as minute cracks approximately 2–3 cm above the soil surface, which over time extended to both upward and downward directions, resulting in the formation of a wider split. The split portion was hollow and brown with a white to grey mycelial mat of the fungus on the inner surface. Such plants became lodged, ultimately resulting in poor seed yield compared with healthy plants. The stem-split plants showed delayed flowering by 1 week over healthy plants. One of the three M. phaseolina isolates used for inoculation of seeds and plants was more aggressive but all isolates were able to reproduce the stem-split symptoms found on naturally infected safflower plants in the field.

Item Type: Article
Uncontrolled Keywords: stem-split symptom, Macrophomina phaseolina, seed-borne fungi, Carthamus tinctorius L.
Subjects: B Life Science > Biotechnology
Divisions: Department of > Biotechnology
Depositing User: manjula User
Date Deposited: 05 Sep 2019 06:31
Last Modified: 05 Sep 2019 06:31
URI: http://eprints.uni-mysore.ac.in/id/eprint/7618

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