UČINEK POVEČANE KONCENTRACIJE CO2 IN POVEČANEGA UV-A SEVANJA NA RASTNI ODZIV CINIJE, PETUNIJE, PETELINJEGA GREBENA IN ŽAMETNICE

Hamidreza Miri, Maryam Sadeghi, Abdolreza Jafari, Mohammad Mehdi Rahimi

Povzetek


Z namenom ovrednotenja učinka povečanega CO2 in UV sevanja na rastni odziv cinije, petunije, petelinjega grebena in žametnice je bil v letu 2015 izveden poskus na Arsanjan Islamic Azad University, Iran. Poskus je bil popoln naključni faktorski poskus s tremi ponovitvami. Obravnavanja so obsegala štiri vrste okrasnih rastlin (cinija, petunija, petelinov greben in žametnica), dve koncentraciji CO2 (350 in 700 ppm), in dve jakosti UV sevanja (brez in z UV sevanjem). Rezultati so pokazali, da je povečana koncentracija CO2 iz 350 ppm na 700 ppm povečala vrednosti morfoloških in fizioloških znakov C3 rastlin, še posebej žametnice. Povečanje koncentracije CO2 iz 350 ppm na 700 ppm je zmanjšalo učinke poškodb po UV v morfoloških in fizioloških znakih. Največje število listov, največja masa suhe snovi in največja učinkovitost izrabe vode so bili pri C4 rastlinah (petelinji greben) zabeleženi pri 350 ppm CO2 brez UV sevanja, pri C3 rastlinah (cinija, petunija in žametnica) je bila največja vrednost znakov kot so število listov, suha masa poganjkov in vsebnost listnih pigmetov ugotovljena pri 700 ppm CO2 brez UV sevanja. Aktivnosti katalaze in peroksidaze sta se v razmerah UV sevanja povečali pri vseh rastlinah. V splošnem lahko zaključimo, da je pri izbiri okrasnih rastlin za učinkovitejše ozelenjevanje urbanih površin potrebno upoštevati tudi njihove morfološko fiziološke lastnosti.

Ključne besede


okrasne rastline; morfološko fiziološke lastnosti; klimatske spremembe; UV sevanje

Celotno besedilo:

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DOI: http://dx.doi.org/10.14720/aas.2017.109.2.11

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