effect of exogenous application of ascorbic acid on some physiochemical changes in oregano (origanum majorana l.) under salt stress

نویسندگان

یحیی سلاحورزی

مربی، دانشکده کشاورزی دانشگاه فردوسی مشهد مرتضی گلدانی

استادیار، دانشکده کشاورزی دانشگاه فردوسی مشهد جعفر نباتی

دانشجوی سابق دکتری، دانشکده کشاورزی دانشگاه فردوسی مشهد مرتضی علیرضایی

دانشجوی کارشناسی ارشد، دانشکده کشاورزی دانشگاه فردوسی مشهد

چکیده

the present study was conducted to evaluate the effect of ascorbic acid (asa) as an important antioxidant in alleviation of salt damage in oregano (origanum majorana l.). this research work was carried out at the research greenhouse of ferdowsi university of mashhad. foliar application of asa (0, 100, 200 mg/l) was carried out on the plants that were under salt stresses of 0, 50, 100 and 150 mm of nacl. a factorial experiment, based on a completely randomized design with three replications was adopted and conducted in 2010. the salinity significantly affected the plant's physiochemical characteristics (electrolyte leakage, chlorophyll content, proline, total carbohydrates, antioxidant activity, phenolic compounds) throughout the experiment. the highest electrolyte leakage occurred under the highest level of nacl (150 mm). electrolyte leakage decreased by 52% through exogenous application of asa (200 mg/l), and this occurred via a protection of plasma membrane against adverse effects of salinity. asa increased the chlorophyll content, carbohydrate and phenolic compounds respectively by 65%, 60% and 38% in comparison with control. thus, it seems that asa is more effective in scavenging of free radicals under severe salt stress, by an induction of antioxidant activity to an extent 5-times higher, as compared with control, and so, helps enhancement of plant survival.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

effect of exogenous application of hydrogen peroxide on some salt tolerance indices in oregano (origanum majorana l.)

salinity is one of the environmental stresses that have limited influence on the crop growth. oxidative process is a secondary stress due to salinity. oregano is enumerated as one of the most important of medicinal plant that its production and development is possible in iran. in order to study the effect of exogenous application of hydrogen peroxide on salt tolerance in oregano (origanum major...

متن کامل

Effect of exogenous application of ascorbic acid on physiological and biochemical characteristics of wheat under water stress

Wheat (Triticum aestivum L.) is widely cultivated in the Mediterranean zone where plantsgenerally suffer from water stress during heading and reproductive stages. This research wascarried out at the experimental farm of the faculty of agriculture, Kafrelsheikh University usingtwo water treatments (water stress and well-watered), four N levels (0, 80, 160 and 240 kg ha-1)and two ascorbic acid le...

متن کامل

Role of Exogenous Application of Auxin on Antioxidant Enzyme Activities in Rice Under Salt Stress

Phytohormones such as auxin are known to be involved in alleviating the detrimental effects of salinity by modulating the activity of enzymatic antioxidants and improving antioxidant system, which help in sustaining plant growth. The present study envisaged revealing the role of exogenous application of indole-3-acetic acid (IAA) in improving defense mechanisms in two genotypes (FL485 and IR29,...

متن کامل

Alleviation of Adverse Effects of Copper on Allium cepa L. by Exogenous Ascorbic Acid Application

Abstract In this study ameliorative effects of ascorbic acid (0.5 mM) on onion (Allium cepa L. cv. Red Azarshahr) under copper stress (Cu: 6.5 μM) were studied. Fresh weights of leaves and roots were reduced in seven week old plants under excess copper condition. Cu stress also reduced membrane stability index in leaves. There was a considerable increase in H2O2 content and lipid peroxidation i...

متن کامل

Exogenous ascorbic acid and glutathione alleviate oxidative stress induced by salt stress in the chloroplasts of Oryza sativa L.

The effects of exogenous ascorbic acid (AsA) and reduced glutathione (GSH) on antioxidant enzyme activities [superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR)] and the contents of malondialdehyde (MDA) and H2O2, as well as of endogenous AsA and GSH, in the chloroplasts of two rice cultivars, the salt-tolerant cultivar Pokkali and the salt-sensitive cultivar ...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
علوم باغبانی ایران

جلد ۴۲، شماره ۲، صفحات ۱۵۹-۱۶۷

کلمات کلیدی
[ ' t h e p r e s e n t s t u d y w a s c o n d u c t e d t o e v a l u a t e t h e e f f e c t o f a s c o r b i c a c i d ( a s a ) a s a n i m p o r t a n t a n t i o x i d a n t i n a l l e v i a t i o n o f s a l t d a m a g e i n o r e g a n o ( o r i g a n u m m a j o r a n a l . ) . t h i s r e s e a r c h w o r k w a s c a r r i e d o u t a t t h e r e s e a r c h g r e e n h o u s e o f f e r d o w s i u n i v e r s i t y o f m a s h h a d . f o l i a r a p p l i c a t i o n o f a s a ( 0 ' , 1 0 0 , ' 2 0 0 m g / l ) w a s c a r r i e d o u t o n t h e p l a n t s t h a t w e r e u n d e r s a l t s t r e s s e s o f 0 ' , 5 0 , ' 1 0 0 a n d 1 5 0 m m o f n a c l . a f a c t o r i a l e x p e r i m e n t ' , ' b a s e d o n a c o m p l e t e l y r a n d o m i z e d d e s i g n w i t h t h r e e r e p l i c a t i o n s w a s a d o p t e d a n d c o n d u c t e d i n 2 0 1 0 . t h e s a l i n i t y s i g n i f i c a n t l y a f f e c t e d t h e p l a n t & a p o s ; s p h y s i o c h e m i c a l c h a r a c t e r i s t i c s ( e l e c t r o l y t e l e a k a g e ' , ' c h l o r o p h y l l c o n t e n t ' , ' p r o l i n e ' , ' t o t a l c a r b o h y d r a t e s ' , ' a n t i o x i d a n t a c t i v i t y ' , ' p h e n o l i c c o m p o u n d s ) t h r o u g h o u t t h e e x p e r i m e n t . t h e h i g h e s t e l e c t r o l y t e l e a k a g e o c c u r r e d u n d e r t h e h i g h e s t l e v e l o f n a c l ( 1 5 0 m m ) . e l e c t r o l y t e l e a k a g e d e c r e a s e d b y 5 2 % t h r o u g h e x o g e n o u s a p p l i c a t i o n o f a s a ( 2 0 0 m g / l ) ' , ' a n d t h i s o c c u r r e d v i a a p r o t e c t i o n o f p l a s m a m e m b r a n e a g a i n s t a d v e r s e e f f e c t s o f s a l i n i t y . a s a i n c r e a s e d t h e c h l o r o p h y l l c o n t e n t ' , ' c a r b o h y d r a t e a n d p h e n o l i c c o m p o u n d s r e s p e c t i v e l y b y 6 5 % ' , ' 6 0 % a n d 3 8 % i n c o m p a r i s o n w i t h c o n t r o l . t h u s ' , ' i t s e e m s t h a t a s a i s m o r e e f f e c t i v e i n s c a v e n g i n g o f f r e e r a d i c a l s u n d e r s e v e r e s a l t s t r e s s ' , ' b y a n i n d u c t i o n o f a n t i o x i d a n t a c t i v i t y t o a n e x t e n t 5 ' , ' t i m e s h i g h e r ' , ' a s c o m p a r e d w i t h c o n t r o l ' , ' a n d s o ' , ' h e l p s e n h a n c e m e n t o f p l a n t s u r v i v a l . ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023