Результати визначення динаміки показників функціонального стану листків рослин агрусу протягом вегетаційного періоду свідчать про вищий фотосинтетичний потенціал рослин сорту Неслухівський та Ізумруд, більшу їх адаптацію до впливу несприятливих умов довкілля. Виявлені кореляційні співвідношення між показниками індукції флуоресценції хлорофілу листків і врожайністю аґрусу дозволяють рекомендувати сорти Ізумруд і Неслухівський до широкого використання у промисловому ягідництві.
The authors present the results of determining the functional state of the four
gooseberry cultivars (Izumrud, Bezshypnyi, Neslukhivskyi and Krasen) plants
leaves indices dynamics during the vegetation period applying the chlorophyll
fluores-cence induction and establishment of the correlations between the
photosynthesis intensity and primary crop. Researched cvs differ concerning the
genetic origin, usage, are characterized with different ripening rates, resistance
to diseases and negative environmental factors. The laboratory study of the
chlorophyll fluorescence induction change in the leaves was carried out in the
Laboratory of Plant Physiology and Microbiology of the Institute of Horticulture
of NAAS of Ukraine using the portable fluorometer “Floratest”. The data of the
investigation prove that the plants of the varieties Neslukhivskyi and Izumrud
have higher photosynthetic potential and are more adaptive to the negative
environmental conditions. The high primary fluorescence intensity level as well
as higher indexes of the maximum fluorescence and stationary level indicate
greater energy losses when it migrates to the reactionary centres. This means
that the pigment complex includes more chlorophyll molecules which are not
connected with the reactionary centres and do not take part in the charge division.
These indices indicate the high potential productivity of the plants of the cultivars
Neslukhivskyi and Izumrud that reflect themselves on the Kautsky induction
curve. Suppose, those cvs can be potential source of the higher photosynthetic
apparatus productivity. Under the similar soil and climatic conditions the
Neslukhivskyi plants prove to be more productive as compared to the rest of the
studied varieties.
The correlation analysis has proved that the productivity of the explored cultivars
is effected most considerably by the fluorescence background level indicator
and coefficient of correlation between the rising and variable fluorescence. The
photosynthetic activity determines the biological productivity and shows the crop
potential abilities as regards the harvest formation, therefore the correlation
between the leaves chlorophyll fluorescence induction indices and gooseberry
yield which we have revealed enables to recommend ‘Izumrud’ and ‘Neslukhivskyi’
for the wide use in the industrial small fruit growing.
