V usloviyah Central'noy Yakutii (62°15′ s. sh., 129°37′ v. d.) vpervye izuchen pigmentnyy sostav list'ev raste- niy yarovogo ovsa (Avena sativa L., rayonirovannyy sort Pokrovskiy) pozdnego sroka seva (25 iyulya), ispol'zuemogo pri zagotovke zelenogo kriokorma. Ustanovleno, chto u osennevegetiruyuschih rasteniy pozdnego poseva soderzhanie hlorofillov (15–16 mg/g suhoy massy) i karotinoidov (2,9 mg/g suhoy massy) do konca pervoy dekady sentyabrya na 11–13 % prevyshali pokazateli kontrol'nyh rasteniy s optimal'nym srokom seva (17 iyunya). Snizhenie tempera- tury so vtoroy poloviny sentyabrya do nachala oktyabrya (ot +7…+8 °S do okolonulevyh) privodilo k postepennomu umen'sheniyu fonda hlorofillov na 40 %. Pri etom otnoshenie Hl a/Hl b ostavalos' prakticheski postoyannym. Do- stovernoe uvelichenie etogo otnosheniya, vsledstvie bol'shey degradacii Hl b, chem Hl a, otmechali lish' pri okolo- nulevyh temperaturah. Karotinoidy proyavili bol'shuyu ustoychivost' k nizkim temperaturam. Pri uhode zelenyh rasteniy v faze molochnoy spelosti pod sneg v oktyabre, soderzhanie summy karotinoidov sostavilo 2,2 mg/ g suhoy massy. Vyyavleno, chto u rasteniy pozdnego poseva dolevoe soderzhanie individual'nyh karotinoidov v obschem pule zheltyh pigmentov malo zaviselo ot fenofazy i sezonnogo snizheniya temperatury. Na dolyu β-karotina prihoditsya 26–30 %, ksantofilly lyutein + zeaksantin sostavlyayut 39–40 %, violaksantin ‒ 17–21, neoksantin ‒ 9–10, anterak- santin ‒ 4–5 % summy karotinoidov. Pri zimnem hranenii zelenoy massy zamerzshih rasteniy v rulonah poteri karotinoidov ne prevyshali 20 %, a ih sootnoshenie prakticheski ne izmenilos'.
oves posevnoy, sroki poseva, osennevegetiruyuschie rasteniya, nizkie temperatury, kriokorm, hlorofilly, karotinoidy, ksantofilly
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