Quantifying photosynthetic properties of drought-resistant and sensitive cotton varieties grown in Eastern Mediterranean conditions
Yükleniyor...
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Hatay Mustafa Kemal Üniversitesi Ziraat Fakültesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
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 droughtsensitive, 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.
Açıklama
Anahtar Kelimeler
Cotton varities, Stomatal conductance, Transpiration rate, Photosynthesis rate
Kaynak
Mustafa Kemal Üniversitesi tarım bilimleri dergisi (online)
WoS Q Değeri
Scopus Q Değeri
Cilt
25
Sayı
1
Künye
ÖDEMİŞ, B., KILIC, S., & EVRENDİLEK, F. (2020). Quantifying photosynthetic properties of drought-resistant and sensitive cotton varieties grown in Eastern Mediterranean conditions. Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi, 25(1), 65-74.
