Quantifying photosynthetic properties of drought-resistant and sensitive cotton varieties grown in Eastern Mediterranean conditions
Abstract
Aims: This study aimed to investigate the effects of different irrigation water levels on evapotranspiration, water use efficiency, stomatal conductance, photosynthesis rates and yields in 14 drought-sensitive and resistant cotton varieties.
Methods and Results:
The trial was carried out according to the
random blocks experimental design pattern. The experimental study was conducted
on ST 506, ST468, BA525, BA119, FLASH, SIOKRA L-22, TAM SPHINX, TAM 94L-25,
PIMA S-7, TAMCOT-22, TAMCOT SP 21 S, TAMCOT SP 23, TAMCOT CAMD-ES and AKSEL
cultivars. Evapotranspiration, water use efficiency, stomatal conductance,
transpiration and photosynthesis rates and yields of the mentioned cultivars
were determined. Photosynthesis rate, transpiration rate and stomatal
conductance were measured only at the levels of full irrigation (I100)
and 25% of the full irrigation (I25).
Conclusions:
The total numbers of irrigation done in
the first and second years were four and six, respectively. The amount of
irrigation water applied varied between 270 and 480 mm in the first year, and
298 and 520 mm in the second year. Yield and evapotranspiration increased
depending on the amount of irrigation water applied. The highest and lowest
yields were determined as 358 kg da-1 in Aksel cultivar and 555 kg
da-1 in BA525 variety, respectively. On average, the photosynthesis
rate was measured as 12,616 µmol m-2 s-1 for I100,
and 7.549 µmol m-2 s-1 for I25. As the
stomatal conductance increased, the yield also increased (0.093 mol m-2
s-1 for I25 and 0.182 mol m-2 s-1
for I100). Transpiration rate was determined as 2.947 mmol m-2
s-1 for I25 and 3.919 mmol m-2 s-1
for I100. The varieties did not significantly differ in terms of
water stress. Aksel cultivar is drought-sensitive, whereas the others are
drought-resistant varieties.
Significance
and Impact of the Study: The research revealed the physiological
characteristics, plant water consumption and water use efficiency of 14
different cotton varieties widely grown in eastern Mediterranean conditions.
And also, when the relationship of the mentioned parameters with yield was
examined, the relationship between stomatal conductance and yield was found
lower than the one between transpiration and photosynthesis rates.
Keywords
Kaynakça
- Bek Y, Efe E (1988) Araştırma ve Deneme Medotları I. Ç.Ü.Ziraat Fakültesi, Ders Kitabı: No:71, 395 S.
- Cook CG, El-Zik KM (1993) Fruiting and lint yield of cotton cultivars under irrigated and non-irrigated conditions. Field Crops Res. 33:411-421
- Doorenbos J, Kassam AH (19799) Yield Response to Water. FAO 33. 193 sayfa.
- Göksoy AT, Turan ZM (1991) Kuraklığın Bitki Fizyolojisi Ve Morfolojisi Üzerine Etkileri. U.Ü.Z.F. Dergisi, No: 8, 189-199, Bursa.
- Gomathinayagam P, Ingram KT, Maguling MA (1988) Pot screening for drought tolerance in rice. Int. Rice Res. Newsl. 13: 19.
- Howell TA, Cuence RH, Solomon KH (1990) Crop yield response. In: hoffman. g.j.. et al.. (eds.) Management of farm ırrigation systems (pp. 93-122). ASAE.
- James LG (1988) Principle of farm Irrigation systemdesign (Surface Irrigation. Newyork 543 pp.
- Jackson P, Rubertson M, Cupper M, Hammer G (1996) The Role of Physiological Understanding in Plant Breeding from Breeding Perspective. Field Crops Res 49. 11–37.
Ayrıntılar
Birincil Dil
İngilizce
Konular
Ziraat Mühendisliği
Bölüm
Araştırma Makalesi
Yazarlar
Berkant Ödemiş
*
0000-0001-7636-2858
Türkiye
Seref Kılıc
0000-0001-6722-6467
Türkiye
Fatih Evrendilek
0000-0003-1099-4363
Türkiye
Yayımlanma Tarihi
6 Nisan 2020
Gönderilme Tarihi
6 Mart 2020
Kabul Tarihi
24 Mart 2020
Yayımlandığı Sayı
Yıl 1970 Cilt: 25 Sayı: 1