ian ▁University ▁and ▁the ▁K ras n od ar ▁Agricult ural ▁Institute ▁and ▁became ▁an ▁associate ▁of ▁the ▁T if lis ▁Botan ical ▁Garden , ▁remaining ▁there ▁until ▁ 1 9 2 1 . ▁That ▁year ▁K ras nos el ska ia ▁returned ▁to ▁L ening rad , ▁as ▁St ▁Petersburg ▁had ▁been ▁renamed ▁by ▁the ▁B ols he vik s , ▁and ▁lect ured ▁at ▁the ▁L ening rad ▁Institute ▁of ▁Text ile ▁Cro ps ▁and ▁the ▁L ening rad ▁Tim ber ▁Institute ▁until ▁ 1 9 2 5 . ▁She ▁was ▁a ▁research er ▁at ▁the ▁Labor atory ▁of ▁Plant ▁Phys i ology ▁of ▁the ▁All - Union ▁Ph yt ological ▁Research ▁Institute ▁from ▁ 1 9 2 5 ▁to ▁ 1 9 3 5 . ▁For ▁the ▁next ▁two ▁years , ▁she ▁was ▁a ▁professor ▁and ▁chair ▁of ▁the ▁Department ▁of ▁Plant ▁Phys i ology ▁and ▁Micro bi ology ▁at ▁the ▁Sar at ov ▁Agricult ural ▁Institute . ▁In ▁ 1 9 3 8 ▁she ▁became ▁chair ▁of ▁the ▁Department ▁of ▁Bot any ▁at ▁the ▁Moscow ▁State ▁V . ▁I . ▁Len in ▁Ped agog ical ▁Institute , ▁remaining ▁there ▁until ▁her ▁death ▁on ▁ 1 7 ▁February ▁ 1 9 5 0 ▁in ▁Moscow . ▁ ▁Activ ities ▁K ras nos el ska ia ' s ▁research ▁concentr ated ▁on ▁the ▁growth ▁and ▁development ▁of ▁plants . ▁She ▁also ▁wrote ▁on ▁the ▁history ▁of ▁plant ▁phys i ology ▁and ▁edited ▁several ▁agricult ural ▁and ▁bi ological ▁diction aries .