an evaluation of some plant growth-promoting characteristics of drought resistant nativepseudomonas fluorescens strains and growth indices as well as yield in wheat

نویسندگان

رخساره خلیلی

کارشناسی ارشد، دانشگاه تهران حسینعلی علیخانی

دانشیار، دانشگاه تهران مهدی زارعی

استادیار، دانشگاه شیراز سمانه رحمت پور

کارشناسی ارشد، دانشگاه تهران

چکیده

drought tolerances of 55 indigenous strains of pseudomonas fluorescens were evaluated. to assess the tolerance rate of the strains to various levels of water deficit, their growth rate in nb medium containing concentrations of 40.587, 438.838 and 548.838 g of polyethylene glycol 6000 per liter of medium were utilized. water potentials of aforesaid levels were estimated as 0, - 10, - 20 and -30 bar, respectively. a number of 39 strains could grow under water stress conditions for which the production of acc-deaminase enzyme as well as indole-3- acetic acid (iaa) hormone were studied. among them, some pseudomonas fluorescens strains were selected as superior ones for greenhouse experiments. the experiments were performed through factorial arrangement in a randomized complete block design of three replications. the results revealed that 25.64 vs. 23.07 percent of the tolerant strains were able to produce high levels of acc- deaminase enzyme vs. indole-3- acetic acid (iaa) hormone, respectively. the greenhouse results indicated that inoculation of plants with superior strains (iaa&acc-deaminase;) significantly increased growth indices as well as yield as compared with control under any of the water stress or normal conditions.

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

Potential use of Iranian rhizobial strains as plant growth-promoting rhizobacteria (PGPR) and effects of selected strains on growth characteristics of wheat, corn and alfalfa

Abstract Many agricultural researches have been performed to improve soil productivity. Nitrogen (N) and Phosphorus (P) are essential elements which are utilized by the plants in large amounts. Phosphorus can be provided by applying chemical fertilizers. Microorganisms convert insoluble phosphate to the soluble form and some bacteria such as rhizobacteria play an important role in this proces...

متن کامل

potential use of iranian rhizobial strains as plant growth-promoting rhizobacteria (pgpr) and effects of selected strains on growth characteristics of wheat, corn and alfalfa

abstract many agricultural researches have been performed to improve soil productivity. nitrogen (n) and phosphorus (p) are essential elements which are utilized by the plants in large amounts. phosphorus can be provided by applying chemical fertilizers. microorganisms convert insoluble phosphate to the soluble form and some bacteria such as rhizobacteria play an important role in this process....

متن کامل

Evaluation of Grain Yield, Agronomical Traits and Drought Tolerance Indices in Some Bread Wheat Cultivars

     In order to study genetic variation and effect of drought stress on grain yield, some agronomical traits and 13 drought tolerance indices, an experiment was conducted on nine cultivars at Shahid Bahonar University of Kerman research field. The experimental layout was conducted in a randomized complete block design with three replications under two complementary irrigation and dryland condi...

متن کامل

Storage duration and temperature of hydroprimed seeds affects some growth indices and yield of wheat.

One of the methods for achieving more yields is to use seed priming technique correctly. When it comes to using seed priming, practically important issues should be taken into account including interval between priming to planting and conditions for storage of primed seeds. Thus, it is very crucial to be informed of duration and temperature for storage of primed seeds. This research seeks to co...

متن کامل

an investigation about the relationship between insurance lines and economic growth; the case study of iran

مطالعات قبلی بازار بیمه را به صورت کلی در نظر می گرفتند اما در این مطالعه صنعت بیمه به عنوان متغیر مستفل به بیمه های زندگی و غیر زندگی شکسته شده و هم چنین بیمه های زندگی به رشته های مختلف بیمه ای که در بازار بیمه ایران سهم قابل توجهی دارند تقسیم میشود. با استفاده از روشهای اقتصاد سنجی داده های برای دوره های 48-89 از مراکز ملی داده جمع آوری شد سپس با تخمین مدل خود بازگشتی برداری همراه با تعدادی ...

15 صفحه اول

Investigating Growth of Frankenia thymifolia as a Cover Plant During Drought Stress in Different Growth Media and Irrigation Periods

There are some plants can replaced grass among cover plants. Cover plants are obvious solution of problem in these places that the most important plant is Frankinia and Lisimakia etc. The aim of this study is to use organic wastes, biological fertilizers and moisture super absorbents in the growth media of Frankinia to increase water holding capacity, delay in permane...

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:
تحقیقات آب و خاک ایران

جلد ۴۳، شماره ۱، صفحات ۶۷-۷۴

کلمات کلیدی
[ ' d r o u g h t t o l e r a n c e s o f 5 5 i n d i g e n o u s s t r a i n s o f p s e u d o m o n a s f l u o r e s c e n s w e r e e v a l u a t e d . t o a s s e s s t h e t o l e r a n c e r a t e o f t h e s t r a i n s t o v a r i o u s l e v e l s o f w a t e r d e f i c i t ' , ' t h e i r g r o w t h r a t e i n n b m e d i u m c o n t a i n i n g c o n c e n t r a t i o n s o f 4 0 . 5 8 7 ' , ' 4 3 8 . 8 3 8 a n d 5 4 8 . 8 3 8 g o f p o l y e t h y l e n e g l y c o l 6 0 0 0 p e r l i t e r o f m e d i u m w e r e u t i l i z e d . w a t e r p o t e n t i a l s o f a f o r e s a i d l e v e l s w e r e e s t i m a t e d a s 0 ' , 1 0 , ' 2 0 a n d ' , ' 3 0 b a r ' , ' r e s p e c t i v e l y . a n u m b e r o f 3 9 s t r a i n s c o u l d g r o w u n d e r w a t e r s t r e s s c o n d i t i o n s f o r w h i c h t h e p r o d u c t i o n o f a c c ' , ' d e a m i n a s e e n z y m e a s w e l l a s i n d o l e ' , 3 , ' a c e t i c a c i d ( i a a ) h o r m o n e w e r e s t u d i e d . a m o n g t h e m ' , ' s o m e p s e u d o m o n a s f l u o r e s c e n s s t r a i n s w e r e s e l e c t e d a s s u p e r i o r o n e s f o r g r e e n h o u s e e x p e r i m e n t s . t h e e x p e r i m e n t s w e r e p e r f o r m e d t h r o u g h f a c t o r i a l a r r a n g e m e n t i n a r a n d o m i z e d c o m p l e t e b l o c k d e s i g n o f t h r e e r e p l i c a t i o n s . t h e r e s u l t s r e v e a l e d t h a t 2 5 . 6 4 v s . 2 3 . 0 7 p e r c e n t o f t h e t o l e r a n t s t r a i n s w e r e a b l e t o p r o d u c e h i g h l e v e l s o f a c c ' , ' d e a m i n a s e e n z y m e v s . i n d o l e ' , 3 , ' a c e t i c a c i d ( i a a ) h o r m o n e ' , ' r e s p e c t i v e l y . t h e g r e e n h o u s e r e s u l t s i n d i c a t e d t h a t i n o c u l a t i o n o f p l a n t s w i t h s u p e r i o r s t r a i n s ( i a a & a c c ' , ' d e a m i n a s e ) s i g n i f i c a n t l y i n c r e a s e d g r o w t h i n d i c e s a s w e l l a s y i e l d a s c o m p a r e d w i t h c o n t r o l u n d e r a n y o f t h e w a t e r s t r e s s o r n o r m a l c o n d i t i o n s . ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023