the effect of drought preconditioning on increasing drought stress tolerance in two turfgrass creeping bentgrass and tall fescue

نویسندگان

کامران امیری نسب

کارشناس ارشد، گروه علوم باغبانی، دانشکدة علوم کشاورزی، دانشگاه گیلان، رشت، ایران هدایت زکی زاده

استادیار، گروه علوم باغبانی، دانشکدة علوم کشاورزی، دانشگاه گیلان، رشت، ایران محمود قاسم نژاد

دانشیار، گروه علوم باغبانی، دانشکدة علوم کشاورزی، دانشگاه گیلان، رشت، ایران محمد حسن بیگلویی

استادیار، گروه مهندسی آب، دانشکدة علوم کشاورزی، دانشگاه گیلان، رشت، ایران

چکیده

drought preconditioning (dp) is a method of irrigation with low frequency and longer duration, to extend the root system and suppress drought damage in plants. in the present study, the effect of dp for 30 days on increasing tolerance to drought stress in two turfgrass species, creeping bentgrass (agrostis stolonifera cv.palustris) and tall fescue (festuca arundinacea cv. greystone) was investigated. dp and control plants were irrigated for 50 days with different levels of soil suction (20-23,40-43, 50-53 and 70-73 centibar), and finally, plants were watered up to field capacity point for 15 days, to recover from stress. results showed that dp significantly lead to reduction in shoot length and increase in root length in both turfgrass species. dp plants showed less shoot dry and fresh weight and also less electrolyte leakage (el) at each levels of stress, in compare with the control. furthermore, dp plants showed greater reduction in el after recovery. dp treatment also reduced leaf rwc at the end of 50 days of stress and after recovery in tall fescue, but in creeping bentgrass retained it at the control level. overall, it appears that dp treatment can increase tolerance to drought stress in two species with increasing root length, reducing shoot length and el and preserving leaf rwc.

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

Study of Traits Related to Yield, Drought Tolerance, Summer Dormancy, and Post-Drought Recovery in Tall Fescue

This study was performed to investigate the effects of drought stress on agronomic traits, post-drought recovery, and survival of tall fescue genotypes in the Research Farm of the Isfahan University of Technology located in Lavark, Najafabad, central Iran. In this study, 67 tall fescue genotypes, including three groups of the early, medium, and late in terms of flowering were studied. All genot...

متن کامل

Elevated cytokinin content in ipt transgenic creeping bentgrass promotes drought tolerance through regulating metabolite accumulation

Increased endogenous plant cytokinin (CK) content through transformation with an adenine isopentyl transferase (ipt) gene has been associated with improved plant drought tolerance. The objective of this study is to determine metabolic changes associated with elevated CK production in ipt transgenic creeping bentgrass (Agrostis stolonifera L.) with improved drought tolerance. Null transformants ...

متن کامل

Metabolic Effects of Acibenzolar-S-Methyl for Improving Heat or Drought Stress in Creeping Bentgrass

Acibenzolar-S-methyl (ASM) is a synthetic functional analog of salicylic acid which can induce systemic acquired resistance in plants, but its effects on abiotic stress tolerance is not well known. The objectives of this study were to examine effects of acibenzolar-S-methyl on heat or drought tolerance in creeping bentgrass (Agrostis stolonifera) and to determine major ASM-responsive metabolite...

متن کامل

Transcriptome analysis of creeping bentgrass exposed to drought stress and polyamine treatment

Creeping bentgrass is an important cool-season turfgrass species sensitive to drought. Treatment with polyamines (PAs) has been shown to improve drought tolerance; however, the mechanism is not yet fully understood. Therefore, this study aimed to evaluate transcriptome changes of creeping bentgrass in response to drought and exogenous spermidine (Spd) application using RNA sequencing (RNA-Seq)....

متن کامل

effect of drought stress on morphological and physiological characteristics of wheatgrass and tall fescue

in this study, the effect of drought stress on morphological and physiological characteristics of wheatgrass and tall fescue was investigated in a factorial-split plot in time arrangement based on a completely randomized design with three replications. after turf establishment, half pots were exposed to drought stress and the half other were completely irrigated. based on the results tall fescu...

متن کامل

Evaluation of Drought Tolerance in Safflower (Carthamus Tinctorius L.)Under non Stress and Drought Stress Conditions

This study was conducted to determine drought tolerance genotypes with superiority in different stressed environments. To screening quantitative indices of drought tolerance, genotypes of safflower (Carthamus tinctorius L.) were tested in a complete randomized block design with three replications under two different water regimes (irrigated and rainfed). Significant positive correlatio...

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:
به زراعی کشاورزی

جلد ۱۶، شماره ۳، صفحات ۵۹۹-۶۱۱

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

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023