modeling seed aging effect on wheat seedling emergence in drought stress: optimizing germin program to predict emergence pattern

نویسندگان

الیاس سلطانی

استادیار گروه علوم زراعی و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران، پاکدشت ـ ایران افشین سلطانی

استاد گروه زراعت، دانشکده علوم زراعی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان ـ ایران مصطفی اویسی

استادیار گروه علوم زراعی و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران، پاکدشت ـ ایران

چکیده

there are some computer programs to calculate germination related traits such as germin which have using problems. the aim of this work was to adjust germin for calculating germination related traits. seed aging effects on the seedling emergence was modeled using the optimized germin. this study was conducted based on completely randomized design in a factorial combination of five seeds aging treatments (0, 48, 72, 96 and 144h accelerated aging periods) and 3 levels of environmental factors. results indicated that chapman–richards function adequately described cumulative emergence in all aging treatments and three environmental conditions. emergence percentage and rate were decreased by seed aging periods from 145 to 194oc day. results showed that observed thermal time for emergence increased as accelerated ageing periods increased and drought stress resulted in increased thermal time. for example, thermal time increased to 240oc day in 144h accelerated aged seeds in severe drought. results indicated that with increasing thermal time in optimum condition, thermal time would increase linearly in the drought stress. optimized program could calculate germination related traits. therefore, it is recommended to use the optimized germin in seed science research.

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

Seedling emergence response to temperature in safflower: measurements and modeling

Quantitative information about the response of seedling emergence totemperature for safflower (Carthamus tinctorius L.) is rare. The main objective ofthe present study was to develop a model for predicting days to emergence forsafflower as influenced by the temperature. In this regard, a field experiment with arange of sowing dates and four safflower cultivars were conducted to describe theresp...

متن کامل

the effect of seed aging on wheat emergence on the response of environmental stress

emergence of crops is affected by environmental factors such as soil water, salinity and sowing and seed quality. the present study was conducted to evaluate the effect of seed aging (seed quality) on emergence of wheat under optimum (control) and stressful conditions including salinity (2 levels), drought (2 levels) and deep sowing depth (physical stress). seeds (cv. ‘zagros’) were kept at a h...

متن کامل

Meta-analysis of seed priming effects on seed germination, seedling emergence and crop yield: Iranian studies

A large body of research has documented the effect of seed priming ongermination, emergence and crop yield. In such research, seed priming has beenfound to have a positive, negative or no effect. Meta-analysis can help tosummarize and interpret a collection of experiments. The aim of this study was toconduct a meta-analysis to synthesize published data from studies addressing theeffect of seed ...

متن کامل

Response of Poaceous Weeds in Wheat to Post-Emergence Herbicides

Poaceous weeds are prolific and competitive in winter crops, but they are more insidious in wheat due to their similar morphology and growing requirements. Herbicides are effective and efficient tools of weed management, however, they are vulnerable to resistance, and herbicides with different modes of action might check the dominance of a particular weed flora. The current study was undertaken...

متن کامل

Effect of Orientation of Seed Placement on Seedling Emergence in Some Species of Calamus

A study on influence of seed orientation on seed germination of three species of rattans namely, Calamus prasinus, C. stoloniferus and C. thwaitesii made by sowing the seeds at 2 cm depth in vertical (micropyle end upward), horizontal (micropylar end sideward) and in vertical(micropylar end downward) orientations. Maximum germination of 80% in seeds of C. prasinus recorded in inverted position ...

متن کامل

Effects of LED Light on Seed Emergence and Seedling Quality of Four Bedding Flowers

Recently much attention has been paid by horticulturists to light-emitting diodes as a new source of economical and spectral-selective light. The reason is mainly coming from their versatility in handling and mounting, long working time, wattage use efficiency and lower heat production. In this study we examined their potential in promoting seed germination and producing quality flower seedling...

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 ۱۵، شماره ۲، صفحات ۱۴۷-۱۶۰

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

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023