Bolj donosne sorte navadne ajde (Fagopyrum esculentum Moench) z determinantno rastjo (enojna det mutacija) imajo večjo fotosintezo v fazi polnjenja zrnja

Alexandr V. AMELIN, Aleksey N. FESENKO, Evgeniy I. CHEKALIN, Ivan N. FESENKO, Valeriy V. ZAIKIN

Povzetek


Primerjava sort navadne ajde z determinantno in nedeterminatno rastjo ne kaže razlik v fotosintezi listov v fazi pred cvetenjem, vendar je razlika v fazi polnjenja zrnja značilna. Največja razlika je bila20 dni po začetku cvetenja, to je v fazi najbolj intezivnega oblikovanja semen. Ti izsledki kažejo, da imajo determinantne sorte večjo moč ponora, ki jo dajejo razvijajoča se semena. To je povezano tudi s sposobnostjo večjega pridelka teh sort. Verjetno je omejitev rasti posledica det-mutacije, kar vodi v nekatere premike v sistemu prioritet ponora v rastlinah ajde in, kar vzpodbudi razvoj dodatnih semen. Nadaljni možni vzrok v spremembi fizioloških parametrov determinatnih sort je v optimizaciji zgradbe rastline, determinatna ajda je v fiziološkem pogledu bolj podobna žitom kot pa nedeterminatni ajdi. Kljub vsemu, pa ostajajo fiziološke spremembe, ki spremljajo prehod od nedeterminantne k determinatni rasti skoraj popolnoma neznane. Domneva o močnemu činku det-mutacije per se na fotosintezo v našem delu ni bila potrjena. Alternativna domneva o kopičenju dodatnih genov, ki pospešujejo sposobnost ponora daje priložnosti za nadaljni napredek pri selekcijskem delu z uporabo ovrednotenja jakosti fotosinteze kot orodja v fazi polnjenja zrnja.

Ključne besede


Fagopyrum esculentum; navadna ajda; velikost fotosinteze; moč ponora; rastna oblika

Celotno besedilo:

PDF (English)

Literatura


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DOI: http://dx.doi.org/10.14720/aas.2020.115.1.1316

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