Physiological responses of sunflower to water stress under different levels of zinc fertilizer

Authors

  • A. Naderi Agriculture and Natural Resource Research Institute, Khuzestan, Iran.
  • B. Majde Nassiri Agriculture and Natural Resource Research Institute, Isfahan, Iran.
  • M. Ebrahimi Student of PhD Islamic Azad University, Science and Research Branch of Khuzestan, Iran.
  • M.R. Khajehpour Islamic Azad University, Khorasgan (Isfahan) Branch, Iran.
Abstract:

To investigate the physiological responses of sunflower (Helianthus annuus L., Alstar hybrid) to water stress under different levels of zinc fertilizer, an experiment was conducted at the Isfahan Agricultural Research Center, Isfahan, Iran, during 2008 and 2009 using a randomized complete block design within a split plot layout with three replications. Five irrigation treatments used in this experiment to impose water stress were IR1 (irrigation after 70 mm cumulative evaporation from class A evaporation pan (CE) during the entire growth cycle as control treatment), IR2 (irrigation after 120 mm CE during the entire growth cycle), IR3 (the same as IR1, except withholding one irrigation at initiation of peduncle elongating (R2)), IR4 (the same as IR1, except withholding one irrigation at the beginning of flowering (R5.1)) and IR5, (the same as IR1, except withholding one irrigation at 70 to 80% flowering (R5.7-8)). Irrigation treatments were allocated to main plots and three zinc fertilizer levels (0, 30 and 60 kg ha-1 of zinc sulfate) to subplots. Water stress reduced leaf relative water content (LRWC), chlorophyll a (CHLa) and b (CHLb), chlorophyll a/b (CHLa/b), total chlorophyll (CHLt), leaf area index (LAI), leaf dry weight (LDW) and head dry weight (HDW), but increased proline (PR) content of leaves. Sixty Kg ha-1 zinc sulfate fertilization could partly prevent deleterious effects of water stress at some occasions. This level of zinc sulfate application might be recommended under conditions similar to this experiment which sufficiency of soil zinc content to cope with water stress is in doubt. Keywords: Chlorophyll; Dry weight; Leaf area index; Proline; Relative water content; Zn.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Physiological responses of two tomato (Lycopersicun esculentum M.) cultivars to Azomite fertilizer under drought stress.

This study was conducted in order to investigate the effect of drought stress and Azomite fertilizer on some physiological traits of two tomato (Lycopersicon esculentum M.) cultivars (izmir and Izabella). A randomized complete design with factorial arrangement with three replications was used. Treatments consisted of three levels of irrigation including FC (control), FC (mild drought stress), a...

full text

Physiological responses of sesame (Sesamum indicum L.) to foliar application of boron and zinc under drought stress conditions

Micronutriens deficiency is prevalent in case of drought stress conditions, so complementary boron and zinc nutrition are important for crops to overcome drought stress. This study evaluated the effect of zinc and boron foliar application on physiological traits of sesame under different irrigation levels. The experiment was conducted as a split plot in a randomized complete block design with t...

full text

DIFFERENT GROWTH RESPONSES OF THE AXIAL AND COTYLEDONARY TISSUES OF SUNFLOWER SEEDS TO C H UNDER WATER AND SALT STRESSES

full text

Maize (Zea mays L.) Agro-Physiological Response to Potassium and Iron Fertilizer under Water Deficit Stress

This research was conducted to evaluate effect of potassium and iron fertilizers on agro-physiological traits affected different irrigation regime of corn in Shahryar (Tehran province, central of Iran) via a split-split plots arrangement based on randomized complete blocks design with three replications during 2015. The main plot included different irrigation regime (Normal irrigation and stop ...

full text

Early Detection of Plant Physiological Responses to Different Levels of Water Stress Using Reflectance Spectroscopy

Early detection of water stress is critical for precision farming for improving crop productivity and fruit quality. To investigate varying rootstock and irrigation interactions in an open agricultural ecosystem, different irrigation treatments were implemented in a vineyard experimental site either: (i) nonirrigated (NIR); (ii) with full replacement of evapotranspiration (FIR); or (iii) interm...

full text

Molecular and Physiological Responses of Sunflower (helianthus Annuus L.) to Pgpr and Sa under Salt Stress

This paper presents the efficacy of PGPR (Azospirillum and Pseudomonas) and its modulation by salicylic acid. Two hybrids of sunflower (Hysun and Parsun) were inoculated with Azospirillum spp. and Pseudomonas spp. prior to sowing. Salt stress (20 dSm) was applied 28 d after sowing followed by foliar spray of salicylic acid (100 μM) after 4 h of salt treatment. Azospirillum and Pseudomonas inocu...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 8  issue 4

pages  483- 504

publication date 2014-08-01

{@ msg @}

By following a journal you will be notified via email when a new issue of this journal is published.

Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023