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Mikrosporangia i ziarna pylku Paracalathiops stachei Remy, 1953 z wiercenia Chełm I

100%

Karczewska J.

Acta Palaeontologica Polonica

1969

tom 14

nr 2

Opisano sporangia i ziarna pyłku Paracalathiops stachei Remy, znalezione w namurze A, wiercenia Chełm I. Gatunek ten był znany dotychczas jedynie z Dolnego Śląska i Szkocji.

Sporangia and pollen of pteridosperms Paracalathiops stachei Remy, 1953 are here described. Sporangia of this species have been known so far only from Lower Silesia and Scotland. The material under study comes from Chełm I bore-hole, from a depth of 1002.5 m. On the basis of a spore analysis, the age of these deposits has previously been determined (Karczewska, 1967) as Namurian A. The present studies have been based on 200 well-preserved sporangia. A great importance of these sporangia, which belong to the oldest pteridosperms having microspores with air bladders, is here emphasized. As index forms of Namurian A, they are also stratigraphically important.

Описаны спорангии и пыльца семенного папоротника Paracalathiops stachei Remy, 1953. Спорангии этого вида до сих пор были известны только из Нижней Силезии и Шотландии. Изученный ныне материал происходит из буровой скважины Хелм I, с глубины 1002,5 м. Стратиграфический возраст этих осадков на основании спорово-пыльцевого анализа (Karczewska, 1967), определен как намюр А. Исследованы 200 спорангиев хорошей сохранности. Отмечено большое значение этих спорангиев, принадлежащих наиболее древнему семенному папоротнику, имеющему микроспоры с воздушными мешками. Они имеют стратиграфическое значение как руководящие формы для намюра А.

First report of twig blight of ban tulsi (Croton bonplandianus Bail.) caused by Choanephora cucurbitarum (Berk.and Ravenel) Thaxt. in India

67%

Das S. , Dutta S. , Ray S. K.

tom 57

nr 4

In August 2015, twig blight disease of ban tulsi (Croton bonplandianus Bail.) caused by Choanephora cucurbitarum (Berk. & Ravenel) Thaxt. was observed for the first time, in the Gangetic alluvial region of West Bengal, India. A severe disease incidence (40–50%) showed twig blight symptoms starting with shoot apical meristem (SAM), leaf, and blossom blight symptoms. Typical symptoms were characterized by over-projecting black pin head like emerging sporangiola which formed mycelial cushion on the infected surface. The present report describes the identification of the causal pathogen as C. cucurbitarum based on its morphology and the internal transcribed spacer of its ribosomal DNA (rDNA – ITS) sequences with 100% identity of NCBI-GenBank published Choanephora database. Optimum temperatures, 28–30°C, coupled with high relative humidity (80–90%) during the monsoon season enhances the disease’s progress. To the best of our knowledge this is the first report of twig blight of C. bonplandianus, caused by C. cucurbitarum, in India as well as globally.

Zywotnosc zarodni przetwalnikowych grzyba Synchytrium endobioticum [Schilb.] Perc. w glebie

67%

Stefan K. , Lubiewska E. , Fracek H.

Progress in Plant Protection

1999

tom 39

nr 2

775-778

Hydromycoflora fungi of small forest lakes Suchary in the Wigry National Park

67%

Czeczuga B.

Acta Mycologica

1995

tom 30

nr 2