influence of si supplementation on growth and some physiological and biochemical parameters in salt-stressed tobacco (nicotiana rustica l.) plants

نویسندگان

r. hajiboland

l. cheraghvareh

چکیده

tobacco is a salt-sensitive glycophyte crop species. in this work effect of silicone (si) supplementation (1 mm as na2sio3) was studied in nicotiana rustica l. cv. basmas grown hydroponically in growth chamber under control, low (25 mm) and high (75 mm) nacl concentration for two weeks. dry matter production of leaves was depressed by salinity level as low as 25 mm and higher salt concentration decreased plants dry weight by 52-82%. si supplementation alleviated salt stress effect as could be judged by higher dry weight of shoot and roots in +si plants compared with –si counterparts. leaf chlorophyll a and carotenoids concentrations and net assimilation rate were higher in si-treated plants not only in salt-affected but also in control plants. si treatment resulted in higher concentration of soluble carbohydrates but not proline. leaf transpiration rate, unexpectedly, was not diminished by si and water use efficiency was rather lowered by si in salt-treated plants. si application caused a slight reduction of na concentration while increased that of k and ca significantly and resulted in higher k:na ratio in the leaves, stem and roots. our results suggested that si application improved tolerance to salt stress in tobacco due to an enhancement of photosynthesis, accumulation of organic osmolytes as well as improvement of k:na selectivity but not limiting water loss. in addition, greater dry matter production of si-supplemented plants in the absence of salt was associated with elevated photosynthesis rate, higher k and ca uptake and proline content.

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

Influence of Si Supplementation on Growth and Some Physiological and Biochemical Parameters in Salt-Stressed Tobacco (Nicotiana rustica L.) Plants

Tobacco is a salt-sensitive glycophyte crop species. In this work effect of silicone (Si) supplementation (1 mM as Na2SiO3) was studied in Nicotiana rustica L. cv. Basmas grown hydroponically in growth chamber under control, low (25 mM) and high (75 mM) NaCl concentration for two weeks. Dry matter production of leaves was depressed by salinity level as low as 25 mM and higher salt concentration...

متن کامل

Carbohydrate-limited Growth Kinetics of Tobacco (Nicotiana rustica L.) Callus.

Logistic curves were fitted to sigmoidal growth data obtained from tobacco (Nicotiana rustica L.) callus grown on media prepared with 0.1, 0.03, 0.01, and 0.003 m sucrose. Analysis of the growth curves indicated that final yields and specific growth rates were influenced by the initial sucrose concentration. Growth yields from the four treatments were similar (0.61 +/- 0.04 gram dry tissue per ...

متن کامل

Assessment of salt tolerance in transgenic tobacco (Nicotiana tobacum L.) plants expressing the AUX gene

Transformation of plants using Agrabacterium rhizogenes may affect secondary metabolite production as well as morphological changes. In this study, T-DNA from Ri plasmid in A. rhizogenes carrying pRi15834-PRT35S-GUS was introduced into tobacco leaf segments to initiate development of transformed hairy roots. Plant regeneration from transgenic roots used MS medium, and plants regenerated fro...

متن کامل

Effects of Azomite on Growth and Some Physiological and Biochemical Characteristics of Basil under Salt Stress Conditions

In order to investigate effects of Azomite application in reducing salinity stress in basil herb, a pot factorial experiment based on completely randomized design with three replications was conducted in the research greenhouse of Agriculture Faculty, Ferdowsi University of Mashhad. Treatments were consisted of salinity stress at three levels (0, 50 and 100 mM) as the first factor and the appli...

متن کامل

Effects of mycorrhizal fungi on some physiological characteristics of salt stressed Ocimum basilicum L. Shekoofeh Enteshari* and Sepideh Hajbagheri

The present study investigates the effects of Glomus mosseae and Glomus intraradices on the resistance of green basil plants to salinity stress. The findings suggested that there was an interaction of effects between mycorrhiza fungi inoculation and salt stress on the physiological characteristics of Ocimum basilicum L. On one hand, salinity decreased percentage of root colonization, root lengt...

متن کامل

Impact of sea salt stress on growth and some physiological attributes of some soybean (Glycine Max L.) varieties.

The impact of three levels of sea salt (0.0, 8.0, and 16.0 mS/cm2) on six varieties of soybean (Crawford, G21, G22, G35, G82, and G83) was studied. Growth criteria, photosynthetic pigments, soluble sugars, soluble protein, free amino acids, free proline, and protein profile of soybean varieties were investigated under sea salt stress. Results of this study showed a considerable decrease in grow...

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:
journal of sciences, islamic republic of iran

ناشر: university of tehran

ISSN 1016-1104

دوره 25

شماره 3 2014

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023