activity and physiological responses of kochia (kochia scoparia) at various salinity application in different growth stages

نویسندگان

جعفر نباتی

دانشجوی دکتری، دانشکدۀ کشاورزی دانشگاه فردوسی مشهد محمد کافی

استاد، دانشکدۀ کشاورزی دانشگاه فردوسی مشهد احمد نظامی

دانشیار، دانشکدۀ کشاورزی دانشگاه فردوسی مشهد علی معصومی

استادیار، دانشگاه پیام نور خراسان رضوی محمد زارع مهرجردی

چکیده

soil and water salinity are the main agricultural problems in arid and semi arid areas in the world and iran. in order to investigate salinity tolerance of kochia, two experiments were conducted in a completely randomized design with four replications, seven levels of salinity (0, 10, 20, 30, 40, 50 and 60 ds m-1) and two growth stages (planting and early seedling) with gradually salinity application. results showed that the reduction of root dry weight, root volume, membrane stability index with increased salinity at planting were more than increased salinity at early seedling stages. relative water content increased with increasing salinity levels in both experiments. proline, osmotic potential, catalase, glutathione reductase, dpph - radical scavenging activities and total phenol increased with increasing salinity levels. sodium concentration and sodium to potassium ratio in shoot and root increased with increasing salinity levels. generally, kochia survive and tolerate 60 ds m-1 of salinity and salinity tolerance in early seedling was higher than the planting stages.

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

evaluation of some physiological characteristics and antioxidants activity in kochia (kochia scoparia) in different of salinity levels and growth stages

soil salinity threat for agricultural ecosystems in many parts of iran, and negatively affects crop production. in order to examine salinity tolerance of kochia a series of experiments were conducted in crd with four replications, seven levels of salinity (0, 10, 20, 30, 40, 50 and 60 ds.m-1), two growth stages (planting and early seedling) and interval irrigation. result showed that decrease o...

متن کامل

Nutritional and toxicological evaluations of kochia hay (Kochia scoparia) fed to lambs.

Kochia foliage that had tested positive to Dragendorff's reagent (presumptive alkaloids) and had elicited chronic toxicosis when fed to rats was fed to sheep to characterize early stages of kochia toxicosis and evaluate treatments that might improve tolerance. Twelve fine-wool lambs (46 +/- 9 kg BW) were fed chopped kochia hay (35%) mixed with chopped alfalfa hay (65%) for 4 wk. The kochia diet...

متن کامل

Fitness Outcomes Related to Glyphosate Resistance in Kochia (Kochia scoparia): What Life History Stage to Examine?

A fast-spreading weed, kochia (Kochia scoparia), has developed resistance to the widely-used herbicide, glyphosate. Understanding the relationship between the occurrence of glyphosate resistance caused by multiple EPSPS gene copies and kochia fitness may suggest a more effective way of controlling kochia. A study was conducted to assess fitness cost of glyphosate resistance compared to suscepti...

متن کامل

evaluation of characteristics forage in different kochia (kochia scoparia) ecotypes in tow salinity levels irrigation

production of halophyte plants with saline water and soil and feeding them to livestock is one of the most sustainable methods of conservation in desert ecosystem regions. kochia is a high salt resistant plant that can widely use as forage for livestock in arid ecosystems with lack of appropriate water and soil resources. in order to investigate potential of forage production of five different ...

متن کامل

Growth and Reproduction of Glyphosate-Resistant and Susceptible Populations of Kochia scoparia

Evolution of glyphosate-resistant kochia is a threat to no-till wheat-fallow and glyphosate-resistant (GR) cropping systems of the US Great Plains. The EPSPS (5-enol-pyruvylshikimate-3-phosphate synthase) gene amplification confers glyphosate resistance in the tested Kochia scoparia (L.) Schrad populations from Montana. Experiments were conducted in spring to fall 2014 (run 1) and summer 2014 t...

متن کامل

Differences in Germination, Growth, and Fecundity Characteristics of Dicamba-Fluroxypyr-Resistant and Susceptible Kochia scoparia

The widespread occurrence of herbicide-resistant (HR) Kochia scoparia is an increasing concern for growers in the US Great Plains and Canada. K. scoparia populations resistant to dicamba have been reported in six US states. Populations cross-resistant to dicamba and fluroxypyr have been reported from wheat fields in Montana, USA. It is unclear whether resistance to the auxinic herbicides (dicam...

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 گیاهان زراعی ایران

جلد ۴۴، شماره ۴، صفحات ۶۴۵-۶۵۵

کلمات کلیدی
[ ' s o i l a n d w a t e r s a l i n i t y a r e t h e m a i n a g r i c u l t u r a l p r o b l e m s i n a r i d a n d s e m i a r i d a r e a s i n t h e w o r l d a n d i r a n . i n o r d e r t o i n v e s t i g a t e s a l i n i t y t o l e r a n c e o f k o c h i a ' , ' t w o e x p e r i m e n t s w e r e c o n d u c t e d i 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 f o u r r e p l i c a t i o n s ' , ' s e v e n l e v e l s o f s a l i n i t y ( 0 ' , 1 0 , 2 0 , 3 0 , 4 0 , ' 5 0 a n d 6 0 d s m ' , ' 1 ) a n d t w o g r o w t h s t a g e s ( p l a n t i n g a n d e a r l y s e e d l i n g ) w i t h g r a d u a l l y s a l i n i t y a p p l i c a t i o n . r e s u l t s s h o w e d t h a t t h e r e d u c t i o n o f r o o t d r y w e i g h t ' , ' r o o t v o l u m e ' , ' m e m b r a n e s t a b i l i t y i n d e x w i t h i n c r e a s e d s a l i n i t y a t p l a n t i n g w e r e m o r e t h a n i n c r e a s e d s a l i n i t y a t e a r l y s e e d l i n g s t a g e s . r e l a t i v e w a t e r c o n t e n t i n c r e a s e d w i t h i n c r e a s i n g s a l i n i t y l e v e l s i n b o t h e x p e r i m e n t s . p r o l i n e ' , ' o s m o t i c p o t e n t i a l ' , ' c a t a l a s e ' , ' g l u t a t h i o n e r e d u c t a s e ' , ' d p p h ' , ' r a d i c a l s c a v e n g i n g a c t i v i t i e s a n d t o t a l p h e n o l i n c r e a s e d w i t h i n c r e a s i n g s a l i n i t y l e v e l s . s o d i u m c o n c e n t r a t i o n a n d s o d i u m t o p o t a s s i u m r a t i o i n s h o o t a n d r o o t i n c r e a s e d w i t h i n c r e a s i n g s a l i n i t y l e v e l s . g e n e r a l l y ' , ' k o c h i a s u r v i v e a n d t o l e r a t e 6 0 d s m ' , ' 1 o f s a l i n i t y a n d s a l i n i t y t o l e r a n c e i n e a r l y s e e d l i n g w a s h i g h e r t h a n t h e p l a n t i n g s t a g e s . ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023