Volkan Mehmet ÇINAR, Aydın ÜNAY, İlkay YAVAŞ

Farklı Puccinellia ciliata Popülasyonlarının Tuzluluk Stresine Fizyolojik ve Tohum Verimi Tepkileri

Puccinellia ciliata B.’nın PSII (Fv/Fm)'nin maksimum fotokimyasal etkinliği, SPAD değeri ve stomatal iletkenlik gibi bazı fizyolojiközellikleri ve tohum verimi ve verim komponentleri üzerinde tuzluluğun etkisi araştırılmıştır. Bu amaçla 7 populasyon tuzlulukstresine maruz bırakılmıştır. Tuz uygulamaları, bitkiler ~ 4 haftalık iken başlamış ve denemenin sonuna kadar devam etmiştir. Fideler30 g/l NaCl çözeltisi ile sulanmıştır. Bitkilerdeki fizyolojik gözlemler, gövde uzama döneminde gerçekleştirilmiştir. Popülasyonlarıntuzluluğa tepkisi Fv/Fm ve stoma iletkenliği için önemli farklılıklar gösterirken SPAD değerleri etkilenmemiştir. III numaralıpopulasyon tuzlu koşullarda daha uzun bitki boyu, salkım başına daha fazla tane sayısı ve daha fazla başakçık sayısı ve tane verimivermiştir. Bu nedenle, puccinellia yetiştiriciliğinde ana ebeveyn olarak kullanılması önerilmektedir.

Physiologic and Seed Yield Responses of Different Alkali Grass(Puccinellia ciliata) Populations to Salinity Stress

It was investigated the effects of salinity on some physiological characters such as maximal photochemical efficiency of PSII (Fv/Fm), SPAD value and stomatal conductance and seed yield and yield components in Puccinellia ciliata B. For this purpose, 7populations were subjected to salinity stress. Salinity applications to plants started when plants were at the ~4 week old, andcontinued until the end of the experiment. Seedlings were watered with 30 g/l NaCl solution. Physiological observations in plantswere carried out at stem elongation stage. The response of populations to salinity shown significant differences for Fv/Fm andstomatal conductance, whereas SPAD values not affected. Population III exhibited longer plant height, higher number of grains perpanicle, spikelet number per panicle, grain yield per plant in salinity conditions. Therefore, it was suggested to be used as a femaleparent in puccinellia breeding.

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