بررسي خصوصيات فنولوژيكي و مقاومت به خشكي وسمه ﴿Isatis cappadocica﴾ به منظور كاربري در فضاي سبز شهر اصفهان

چكيده انگليسي :

Assessment of phenological characteristics and drought tolerance of due to use in Isfahan landscape Shahrzad rafinezhad s rafinezhad@ag iut ac ir Department of Horticultural Science Isfahan university of technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisior Assist Prof N Etemadi Etemadin@cc iut ac ir Assist Prof A Nikbakht anikbakht@cc iut ac ir Abstract About one third of world lands have rainfall deficit and Iran with approximately 250 mm rainfall in a year is classified as arid area Insufficient and non uniform rainfall in growth season in arid and semiarid area like our country cause that plant water requirement doesn t secure So utilization of correct method of irrigation and agriculture is usefull is herbaceous and two year plant which its height is 0 8 to 1 2 meters This plant has straight and green stem which has a lot of branches It s flowers are androgynous and yellow which have 5 15 centimiteres punicul inflorescence It is necessary to study this plant as a drought resistance plant So the goal of this research is discussion about the drought effect on morphological and physiological chractristics of This research was done in two vegetative and flowering PHase of this plant Treatment and methods were same but were done in two pot and field cultivation in first and second year This treatments were involved 100 75 and 50 of field capacity among each others which in pot cultivation each pot in each treatment received water amout equivalent of 720 540 and 320 mililitre Treatments were studied in Randomized complete block designed and each experimental unit had four pots Treatments in field cultivation were included 100 75 50 field capacity and natural situation which irrigated just with rainfall Treatments were done with changing in irrigation cycle as one three and seven days Results showed that drought stress had not significantly affected plants crown cover area The least and highest shoots fresh and dry weights were recorded in treatments 100 and 50 75 field capacity respectively Roots fresh and dry weight and proline content was much more in 50 field capacity than two others treatments The shoots soluble carbohydrates content and root length were high in treatment 50 field capacity followed by 75 and 100 Also there was an increasingly trend in antioxidant enzymes activity from the second to forth weeks In field capacity of 50 activity of enzymes ascorbat peroxidase peroxidase and catalase was much more than other treatments and this accounted four highest values for superoxide dismutase in two treatments of 50 and 75 field capacity Results of field cultivation showed that there is significant difference between 100 75 field capacity with 50 field capacity and natural situation treatment in plant crown cover area Drought stress had significantly affected height of plants The diagnol of flowering stem had not affected by drought stress but the numbers of them changed significantly Drought stress had affected number and diagnol of flowers such that there was a difference between 100 75field capacity with 50 field capacity and natural situation treatments Drought stress doesn t affected the time of formation of flowering stem time of starting flowering flowering diuration and time of establishment of fruiting Proline and soulable carbohydrate increased significantly As a result this plant has optimum growth in 100 and 75 field capacity Although its growth limited in 50 field capacity and natural situation but it doesn t disappread Key words drought stress proline antioxidant enzymes soulable carbohydrate PDF created with pdfFactory trial version www pdffactory com

رفيع نژاد، شهرزاد

بررسي خصوصيات فنولوژيكي و مقاومت به خشكي وسمه ﴿Isatis cappadocica﴾ به منظور كاربري در فضاي سبز شهر اصفهان

پرولين , آنزيم هاي آنتي اكسيداني , كربوهيدراتهاي محلول