Impact of silicon foliar application in enhancing antioxidants, growth, flowering and yield of squash plants under deficit irrigation condition

Abstract Safflower is originated from Iran and is tolerant against water deficit stress. However, in semi-arid Mediterranean climate terminal drought and heat stress adversely affect the safflower production. In order to investigate the influence of foliar application of proline (Pr) (10 and 20 mM) and glycinebetaine (GB) (2 and 4 mM) under well and deficit irrigation (37.23° N,46.16° E). Foliar spray of compatible organic solutes started from middle vegetative growth and continued till seed filling stage. Comparison of well irrigated and stress conditions revealed that severity of water deficit stress (SI) was 0.25. Evaluation of growth-related morphological characteristics such as plant height, leaf area, canopy spread and percent ground cover showed that they considerably reduced by water deficit stress. However, foliar application of compatible solutes could somewhat increase growth related parameters. Results showed that water deficit stress noticeably reduced the chlorophyll content, while foliar spray could alleviate the water deficit stress effects when compared with intact plant (non-sprayed plants). The beneficial effect of GB was more prominent than Pr, especially under deficit irrigation condition. Principal component analysis (PCA) indicated that the best performance under well irrigated condition was obtained by application of 4 mM GB while under deficit irrigation condition the best performance was recorded for plants treated with 2 and 4 mM GB and 20 mM Pr. Overall, results of current experiments showed that foliar spray with high concentration of GB may can significantly alleviate the adverse effects of water deficit stress.

Download Full-text

Evaluation of changes in fatty acid profile, grain, and oil yield of Carthamus tinctorius L. in response to foliar application of polyamine compounds under deficit irrigation conditions

Industrial Crops and Products ◽

10.1016/j.indcrop.2020.113231 ◽

2021 ◽

Vol 161 ◽

pp. 113231

Author(s):

Kayvan Fathi Amirkhiz ◽

Majid Amini Dehaghi ◽

Seyed Ali Mohammad Modares Sanavy ◽

Alireza Rezazadeh

Keyword(s):

Fatty Acid ◽

Fatty Acid Profile ◽

Deficit Irrigation ◽

Foliar Application ◽

Carthamus Tinctorius ◽

Oil Yield

Download Full-text

Effects of Irrigation Deficit and Application of Some Growth Regulators on Defense Mechanisms of Canola

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha4319668 ◽

2015 ◽

Vol 43 (1) ◽

pp. 124-130 ◽

Cited By ~ 3

Author(s):

Seyed Ahmad KALANTAR AHMADI ◽

Ali EBADI ◽

Jahanfar DANESHIAN ◽

Soodabeh JAHANBAKHSH ◽

Seyed Ataollah SIADAT ◽

...

Keyword(s):

Ascorbic Acid ◽

Deficit Irrigation ◽

Defense Mechanisms ◽

Agricultural Research ◽

Foliar Application ◽

Maximum Activity ◽

Flowering Stage ◽

Relative Water ◽

Irrigation Deficit ◽

Main Factor

A split-plot experiment arranged in a randomized complete blocks design with three replications was carried out in Safiabad Agricultural Research Center of Dezful in order to investigate the effects of foliar applications of ascorbic acid (AsA), salicylic acid (SA) and methanol (Me), under deficit irrigation conditions, in canola; there were 3 levels of irrigation as the main factor (irrigation after 70 mm evaporation from the pan as control, cessation of irrigation at the flowering stage and cessation of irrigation at the appearance of siliques) and 10 levels of foliar applications as sub-factor (100, 200 and 300 mg.l-1AsA; 100, 200 and 300 ÂµM SA; 10, 20 and 30% (w/v) methanol; and foliar application of distilled water as control). Foliar applications were made during both budding and initiation of flowering stages. Results indicated that antioxidant enzymes showed different responses to deficit irrigation and foliar application treatments. Maximum catalase (CAT) and polyphenol oxidase (PPO) activities were observed under cessation of irrigation at flowering stage and foliar application of 300 ÂµM SA, while ascorbate peroxidase (APX) reached its maximum activity under the same irrigation conditions and foliar application of 300 mg.l-1AsA. SA had more influence to increase in CAT and PPO activity under cessation of irrigation at flowering stage. The relative water content (RWC) was also decreased due to the drought stress caused by the cessation of irrigation. Foliar application of SA (100 μM) and Me (10% w/v) had more influence to maintain RWC compared to ascorbic acid under irrigation cessation at flowering stage.

Download Full-text

Soil Amendment Using Biochar and Application of K-Humate Enhance the Growth, Productivity, and Nutritional Value of Onion (Allium cepa L.) under Deficit Irrigation Conditions

Plants ◽

10.3390/plants10122598 ◽

2021 ◽

Vol 10 (12) ◽

pp. 2598

Author(s):

Khaled G. Abdelrasheed ◽

Yasser Mazrou ◽

Alaa El-Dein Omara ◽

Hany S. Osman ◽

Yasser Nehela ◽

...

Keyword(s):

Drought Stress ◽

Allium Cepa ◽

Water Scarcity ◽

Deficit Irrigation ◽

Soil Amendment ◽

Nutritional Value ◽

Foliar Application ◽

Field Trials ◽

Global Challenge ◽

Allium Cepa L

Water scarcity, due to physical shortage or inadequate access, is a major global challenge that severely affects agricultural productivity and sustainability. Deficit irrigation is a promising strategy to overcome water scarcity, particularly in arid and semiarid regions with limited freshwater resources. However, precise application of deficit irrigation requires a better understanding of the plant response to water/drought stress. In the current study, we investigated the potential impacts of biochar-based soil amendment and foliar potassium-humate application (separately or their combination) on the growth, productivity, and nutritional value of onion (Allium cepa L.) under deficient irrigation conditions in two separate field trials during the 2018/2019 and 2019/2020 seasons. Our findings showed that deficit irrigation negatively affected onion resilience to drought stress. However, these harmful effects were diminished after soil amendment using biochar, K-humate foliar application, or their combination. Briefly, integrated biochar and K-humate application increased onion growth, boosted the content of the photosynthetic pigments, enhanced the water relations, and increased the yield traits of deficient irrigation onion plants. Moreover, it improved the biochemical response, enhanced the activities of antioxidant enzymes, and enriched the nutrient value of deficiently irrigated onion plants. Collectively, these findings highlight the potential utilization of biochar and K-humate as sustainable eco-friendly strategies to improve onion resilience to deficit irrigation.

Download Full-text

Alleviating the adverse effects of deficit irrigation in Flame seedless grapevine via Paulsen interstock

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452022839 ◽

2022 ◽

Vol 44 (1) ◽

Author(s):

Mohamed Ahmed Fayek ◽

Ahmed Abdelhady Rashedy ◽

Amr Ebrahim Mohamed Ali

Keyword(s):

Deficit Irrigation ◽

Field Capacity ◽

Adaptation Strategy ◽

Diffusion Resistance ◽

Phloem Tissue ◽

Vitis Rupestris ◽

Leaf Transpiration ◽

Relative Water ◽

Irrigation Condition ◽

Growth Vigor

Abstract Using interstock with a potential genetic base is considered more recent and sustainable strategy for mitigating the water deficit. This investigation was carried out on transplant of Flame seedless (Vitis vinifera) grapevine grafted onto two rootstocks namely; Freedom (Vitis champinii x 1613C) and 1103Paulsen (vitis berlandieri x Vitis rupestris) with or without 1103Paulsen as interstock to determine its performance under deficit irrigation condition (50% of field capacity). The results indicated that Paulsen as rootstock or as interstock significantly increased the growth vigor of Flame seedless scion as well as the leaf content of total proline, phenols and sugars. Paulsen rootstock has decreased stomatal conductance, leaf transpiration rate and increased diffusion resistance under 50% deficit irrigation compared with grafting on Freedom rootstock. Moreover, Paulsen as interstock for Flame seedless grafted onto Freedom rootstock significantly increased relative water content accompanied by an increase in thickness of leaf anatomical characters such as midvein, lamina, palisade, xylem and phloem tissue under deficit irrigation compared with grafts without Paulsen interstock. This study suggests that using Paulsen as interstock, can be an adaptation strategy for water stress through controlling in some morphological, chemical physiological and anatomical responses of scion.

Download Full-text

Effects of Enzymatic Biofertiliser on Growth and Yield of Lentil Genotypes under Deficit Irrigation/ Enzimatisko Biomçslojumu Ietekme Uz Daþâdu Lçcu Genotipu Augðanu Un Raþu Irigâcijas Trûkuma Apstâkïos

Proceedings of the Latvian Academy of Sciences Section B Natural Exact and Applied Sciences ◽

10.2478/prolas-2014-0020 ◽

2014 ◽

Vol 68 (3-4) ◽

pp. 174-179

Author(s):

Mohsen Janmohammadi ◽

Hamid Mostafavi ◽

Naser Sabaghnia

Keyword(s):

Drought Stress ◽

Grain Yield ◽

Deficit Irrigation ◽

Morphological Traits ◽

Foliar Application ◽

Growth And Yield ◽

Sowing Time ◽

Ecological Zones ◽

Terminal Drought ◽

Terminal Drought Stress

Abstract Lentil (Lens culinaris Medic.) is one of the important pulse crops in semiarid agro-ecological zones with a Mediterranean-type climate. Terminal drought stress and poor plant nutrition are important factors limiting crop under these regions. The effects of enzymatic biofertiliser (MOG) application at sowing time or during reproductive stage on some morphological traits and yield components of eight lentil lines were evaluated under deficit-irrigation conditions at Maragheh (37°23' N; 46°16' E) in northwestern Iran. Results revealed that application of biofertiliser did not significantly affect most of the morphological traits. However, foliar application of MOG during early flowering stage somewhat increased 100-grain weight and grain yield and decreased the number of empty pod per plant. Moreover, the results indicated that there was significant diversity between lentil lines for the investigated traits. The best performance for grain yield was recorded for FLIP 86-35L. The overall lack of considerable response of lentil to the MOG treatments may suggest that the optimal efficiency of biofertiliser cannot be achieved under water scarcity conditions. Improvement in the adaptation of enzymatic fertilisers to semi arid regions with terminal drought stress requires to be increased.

Download Full-text