"EKSTREMAL IQLIM SHAROITIDA POLIFUNKSIONAL MIKROB KONSORSIUMLARINING MAHALLIY QULUPNAY NAVLARI AGROFIZIOLOGIK VA BIOKIMYOVIY KOʻRSATKICHLARIGA TAʼSIR KOʻRSATISH MEXANIZMLARI"
Keywords:
Fragaria × ananassa, qurg‘oqchilik stressi, suv tanqisligi, Bacillus, Priestia, Pseudomonas, kserofit mikroflora, ACC-deaminaza, osmoproteksiya, ildiz, biostimulyator.Abstract
Qurg‘oqchilik qulupnay yetishtirishda suv statusi, ildiz rivojlanishi, fotosintez va mineral oziqlanishni cheklab, hosildorlikni pasaytiruvchi asosiy abiotik stress omilidir. Mazkur tadqiqotda kserofit o‘simliklardan ajratilgan Bacillus, Priestia va Pseudomonas shtammlari asosidagi polifunksional konsorsiumlarning qulupnay o‘sishi va hosildorligiga ta’siri baholandi. O‘g‘itsiz issiqxona sharoitida inokulyatsiya ildiz, poya va barg ho‘l biomassasini nazoratga nisbatan 23,2–30,2%, meva massasini esa 13,5–14 g dan 20–22 g gacha oshirdi; generativ rivojlanish 4–5 kun oldin boshlandi. Ushbu natijalar tadqiqotlarda aniqlangan PGPR mexanizmlari bilan uyg‘un bo‘lib, bakteriyalarning ACC-deaminaza, ekzosaxarid, fitogormon va osmoprotektiv birikmalar hosil qilishi ildiz rivojlanishi, suvdan foydalanish va stressga chidamlilikni kuchaytirishi mumkin. Qulupnayda PGPR inokulyatsiyasi qurg‘oqchilik sharoitida fotosintezga yetkaziladigan zararni ≈67% gacha kamaytirgani ham qayd etilgan.
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