scholarly journals OPTIMIZATION OF IN VITRO SELECTIVE MEDIA FOR SELECTING ANTHRACNOSIS-RESISTANT FLAX CELLS

Author(s):  
Н.В. Пролётова ◽  
Л.П. Кудрявцева

Цель исследований – оптимизация селективных сред для проведения отбора in vitro каллусных клеток льна, устойчивых к культуральному фильтрату штаммов возбудителя антракноза и создание in vitro новых генотипов, устойчивых к болезни. В результате исследований уточнен состав культурального фильтрата штаммов антракноза. Выявлено, что токсичность культуральных фильтратов не зависела от вирулентности используемых штаммов – более токсичными оказались культуральные фильтраты штаммов 784 (сильновирулентного) и 780 (средневирулентного) (загнивание и отмирание первичных корешков на 5 сутки наблюдали у 67 – 88% проросших семян), менее токсичны – штаммы 793 (сильновирулентный) и 788 (слабовирулентный) (на 5 сутки загнивание и отмирание первичных корешков отмечено у 9 – 15% проросших семян). Установлено, что морфогенные очаги формировались активнее у генотипов, морфогенный каллус которых переносили на среду с аналогичной или более высокой концентрацией культурального фильтрата. Показано, что на 14 сутки во втором пассаже с большей частотой формировались морфогенные каллусы, почки и побеги при использовании в первом и втором пассажах селективной среды, содержащей культуральный фильтрат в концентрации 40 мл/л, или в первом пассаже – 40 мл/л, а во втором – 44 мл/л. Выделены генотипы, сохраняющие устойчивость к антракнозу в течение трёх поколений на уровне 50 – 60%: НО-78 х Ленок, HJI-103-2 х Ленок, НЛ-40-1 х Ленок, HЭ-38 х Росинка, НЭ-36 х Ленок, НЭ-17 х Ленок, HЭ-16-2 х Росинка. Research objective – optimization of selective media for in vitro selection of flax callus cells resistant to culture filtrate of anthracnose pathogen strains and in vitro creation of new disease-resistant genotypes. As a result of the research, the composition of the culture filtrate of anthracnose strains was clarified. It was revealed that the toxicity of cultural filtrates did not depend on the virulence of the strains used - cultural filtrates of strains 784 (highly virulent) and 780 (medium virulent) turned out to be more toxic (decay and death of primary roots on day 5 was observed in 67 - 88% of germinated seeds), less toxic - strains 793 (strongly virulent) and 788 (weakly virulent) (on the 5th day, decay and death of primary roots was noted in 9-15% of germinated seeds). It was found that morphogenic foci were formed more actively in genotypes, the morphogenic callus of which was transferred to a medium with a similar or higher concentration of the culture filtrate. It was shown that on the 14th day in the second passage, morphogenic callus, buds and shoots were formed with a greater frequency when using in the first and second passages a selective medium containing a culture filtrate at a concentration of 40 ml/l, or in the first passage - 40 ml/l, and in the second - 44 ml/l. Genotypes were identified that retain resistance to anthracnose for three generations at a level of 50 - 60%: NO-78 x Lenok, HJI-103-2 x Lenok, NL-40-1 x Lenok, NE-38 x Rosinka, NE-36 x Lenok, NE-17 x Lenok, NE-16-2 x Rosinka.

2021 ◽  
Vol 212 ◽  
pp. 92-97
Author(s):  
N. V. Proletova ◽  

The research was carried out on the basis of the laboratory of selection technologies of the Federal State Budgetary Scientific Institution “Federal Scientific Center of Fiber Crops” (Tver region) in 2018–2020. The aim of the research is in vitro development of new flax genotypes resistant to anthracnose, one of the most harmful fungal diseases. As a result of the research, the composition of the cultural filtrate of the anthracnose causative agent was clarified. It was revealed that toxicity of the cultural filtrates did not depend on the virulence of the strains used in the present studies, the cultural filtrates of strains 784 (highly virulent) and 780 (medium virulent) turned out to be more toxic (decay and death of radicle was observed on the 5th day in 67 - 88% of germinated seeds), less toxic are strains 793 (highly virulent) and 788 (weakly virulent) (decay and death of radicle was observed on the 5th day in 9-15% of germinated seeds). It was found that morphogenic foci were formed more actively in genotypes the morphogenic callus of which was transferred to a medium with a higher concentration of the cultural filtrate; it was shown that in the second passage, when transferring morphogenic calli from a selective medium, which contains 40 ml / L of cultural filtrate on a selective medium also containing 40 ml / L of cultural filtrate, as well as on a selective medium containing 44 ml / L of cultural filtrate, the number of formed morphogenic calli and green buds on the 14th day is significantly higher than in case of transferring on a selective medium containing 36 ml / L of cultural filtrate. Viable regenerant plants were obtained and genotypes were isolated, which retained resistance to anthracnose for three generations at a level of 50 - 60%: NO-78 x Lenok, NL-103-2 x Lenok, NL-40-1 x Lenok, NE-38 x Rosinka, NE-36 x Lenok, NE-17 x Lenok, NE-16-2 x Rosinka.


1990 ◽  
pp. 409-416 ◽  
Author(s):  
P. ROSATI ◽  
B. MEZZETTI ◽  
M. ANCHERANI ◽  
S. FOSCOLO ◽  
S. PREDIERI ◽  
...  

Author(s):  
S. Yu. Lugovtsova ◽  
N. A. Neshumaeva ◽  
V. Yu. Stupko ◽  
N. V. ZobovaN.V.

The oat regenerants with resistance to the Fusarium mycotoxin influence were obtained in vitro on selective media with different concentrations of root rot culture filtrate.


The purpose of this research was to create new flax genotypes resistant to anthracnose using biotechnological techniques and methods. As a result of studies with using a culture of immature embryos and a selective medium, flax regenerant plants resistant to the culture filtrate (CF) of the fungus - anthracnose pathogen Colletotrichum lini Manns et Bolley and line 21 resistant to this pathogen were obtained. A scheme for differentiating flax genotypes in vitro by resistance to anthracnose has been developed. It was established that upon cultivation of immature embryos on Sh-2 medium containing CF of the fungus, the causative agent of anthracnose, of a mixture of strains 680, 677 * 674, 674 * at a concentration of 36.0 ml / l, the amount of morphogenic callus formed in the first and second passages, expressed in percent, and the indicator of the field resistance of this genotype to anthracnosis on an artificial infectious-provocative background was close in value, and the number of morphogenic callus formed in the first and second passages can be used to judge the resistance of the studied genotypes to ant cancer and differentiate them by resistance to this pathogen. The influence of the flax genotype on the potency of cells to morphogenesis under selective conditions was revealed. Cells of genotypes L 957-8-7, Alexim, Punjab, Zaryanka had high morphogenetic activity. The morphogenetic potential of genotypes L 1506-8-4, Rosinka has already been exhausted by 2 ... 3 passages. It was found that biotechnological methods: cell selection in vitro, embryo culture are effective in creating genotypes of flax, more resistant to anthracnose than original forms.


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