VPLIV SPREMENJENIH TEMPERATUR NA ALELOPATSKE LASTNOSTI MEHIŠKEGA ZRNATEGA ŠČIRA Amaranthus cruentus L.

Maria Elizabeth Cawood, Ingrid ALLEMANN, James ALLEMANN

Povzetek


Odnosi med alelokemikalijami in okoljskimi dejavniki so odločilni za rast rastlin v kolobarju. V razmerah in vitro poskusa je bil preučevan alelopatski potencial mehiškega zrnatega ščira (Amaranthus cruentus L.) v različnih temperaturnih razmerah. Inhibitorni učinek na kalitev in rast vrtne solate (Lactuca sativa L.), paradižnika (Solanum lycopersicum L.), paprike (Capsicum annuum L.) in kumar (Cucumis sativus L.) je bil ugotovljen, kadar so bila semena teh vrtnin izpostavljena listnim ostankom mehiškega zrnatega ščira. Analize so pokazale, da so na odstotek kalitve značilno vplivali rastna temperatura (T) ščira (T) (P ˂ 0.0001), količina listnih ostankov (C) (P ˂ 0.0001) in vrsta vrtnine (V) (P ˂ 0.0001) kot tudi interakciji T × V (P = 0.0041) in V × C (P ˂ 0.0001). Najbolj občutljiva je bila paprika z upadom odstotka kalitve pri naraščanju koncentracije ščira (0, 1 in 5 mg ml-1). Na dolžino hipokotila in semenske korenine so ostanki ščira vplivali negativno pri vseh temperaturah, vendar so bili učinki izrazitejši pri visokih temperaturah. Inhibicija, ki so jo povzročili ostanki ščira, je bila odvisna od njihovih količin in rastnih temperatur, vendar je vsaka od vrtnin pokazala različno občutljivost.

Ključne besede


Amaranthus cruentus; alelopatija; vrtnine; kalitev; hipokotil, semenska korenina; setveni kolobar

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2017.109.2.29

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