Plant Productions

The Effect of Anti-Transpiration and Plant Protective Materials on Vegetative and Physiological Traits of (Hyssopus officinalis L.) under Drought Stress

Sarah Khajeh Hosseini; Farzad Fanoodi; S.A Tabatabaee; Rostam Yazdani Biouki; Jafar Masoud Sinaki

Volume 44, Issue 1 , June 2021, , Pages 77-88

https://doi.org/10.22055/ppd.2019.28805.1734

Abstract

AbstractBackground and ObjectivesHyssop (Hyssopus officinalis L.) is a perennial and belongs to the Lamiaceae family. Drought is the most critical environmental stress that adversely ... Read More AbstractBackground and ObjectivesHyssop (Hyssopus officinalis L.) is a perennial and belongs to the Lamiaceae family. Drought is the most critical environmental stress that adversely affects crop plant performance. The use of anti-transpiration and plant protective materials is one way that has recently been raised to improve plant resistance under stress conditions. The purpose of this experiment was to investigate the effect of anti-transpiration and plant protective materials on vegetative and physiological traits of Hyssop under drought stress and foliar application time. Materials and MethodsThis research was conducted as a split-plot factorial experiment based on a completely randomized design with three replications in 2016-2017. The experimental treatments included irrigation in three levels: 25% water available from the soil (control), 50% water available from the soil (mild stress), and 75% water available from the soil (severe stress) Were the main plots. Foliar application in four levels: water (control), kaolin (2.5%), chitosan (0.4 g/ l) and glycine amino acid (2.5 per thousand), and foliar application time: (vegetative and flowering, flowering) were the subplots. In the present study, dry leaf weight, flower dry weight, essential oil yield, shoot dry weight, economic yield, harvest index, proline, and soluble sugar were measured. ResultsThe results showed that at control stress level, the foliar application of water had the highest leaf dry weight (81.3 g/m2), shoot dry weight yield (140.5 g/m2), essential oil yield (9.40 g/m2), economic yield (81.3 g/ m²), and proline content (8.558 (µM/g FW). Moreover, during flowering and vegetative + flowering, kaolin's foliar application during vegetative+flowering had the highest dry flower weight (53 g/m2). At mild stress level, the foliar application of water during vegetative+flowering included the highest amount of soluble sugar (0.396 mg/g FW), and glycine foliar application at the flowering time had the highest harvest index (79%). Also, kaolin spraying during vegetative+flowering had the highest economic yield (73 g/m), and chitosan foliar application during vegetative+flowering had the highest shoot dry weight (111 g/m²) and essential oil yield (7.55 g/m2). DiscussionDue to the beneficial effects of antiperspirants and plant protection, they can be used as suitable solutions to increase plant production and reduce drought stress in arid and semi-arid regions.

The Role of Covering and Antitranspirant substances on Control of Date Bunch Fading in Mazafati Cultivar

A. Shoorabadi; M.H. Shamshiri; M. najafinia; S.H. Mirdehghan

Volume 39, Issue 1 , June 2016, , Pages 47-64

https://doi.org/10.22055/ppd.2016.12041

Abstract

Background and Objectives The phenomenon of date-bunch fading is one of the most important problems of some Iranian date producers. This disorder causes fruit shrinkage at the stage ... Read More

Studying the effect of kaolin on fluorescence and chlorophyll content in leaves of olive plants (Olea europaea L. cv Dezful) under water deficit sress

E. Khaleghi; K. Arzani; N. Moallemi; M. Barzegar

Volume 37, Issue 2 , September 2014, , Pages 127-139

Abstract

With respect to arid and semi-arid climate of Iran, using methods which mitigate detrimental effects of water deficit on horticultural products would be of significant importance. Kaolin ... Read More With respect to arid and semi-arid climate of Iran, using methods which mitigate detrimental effects of water deficit on horticultural products would be of significant importance. Kaolin is an anti-transpiration material the application of which has been expanded during the recent years. For this purpose, the effect of three different levels of kaolin (0, 3 and 6%) as well as three different levels of irrigation (100, 65 and 40% potential ETcrop) on chlorophyll content and chlorophyll fluorescence in olive leaves “Dezful’ were examined as factorial test based on a completely randomized design in three replications (each replication including 3 pots) in the greenhouse of Horticulture Department, Faculty of Agriculture, Tarbiat Modares University (Tehran, Iran). The obtained results demonstrated that chlorophyll a and total chlorophyll were reduced under water deficit. The amount of reducing of chlorophyll a and total chlorophyll in 80 days after treatment was greater than that in 40 days after treatment. In addition, the amount of total chlorophyll in the sprayed plants with 6% kaolin was the highest (1.425 mg/g fresh weigh of leaf) in 80 days after treatment. Furthermore, it was shown that by reducing of water content to 65 and 40% ETcrop the content of chlorophyll “a” was greater than the plants which were sprayed at kaolin concentrations of 3 and 6% in comparison with the control. Meanwhile, the results of fluorescence parameters showed that maximum fluorescence indices (Fm), fluorescence variable (Fv) and ratio of fluorescence variable to maximum fluorescence (Fv/Fm) were reduced under drought stress. However, the kaolin treatment had no significant effect on these indices. Generally, it can be expected that spraying of the olive gardens in Iran with kaolin, especially in regions exposed to water deficit can moderate the drought stress and mitigate the detrimental effects of water deficit, while improving photosynthesis efficiency of the leaf.

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Keywords = kaolin

The Effect of Anti-Transpiration and Plant Protective Materials on Vegetative and Physiological Traits of (Hyssopus officinalis L.) under Drought Stress

Abstract

The Role of Covering and Antitranspirant substances on Control of Date Bunch Fading in Mazafati Cultivar

Abstract

Studying the effect of kaolin on fluorescence and chlorophyll content in leaves of olive plants (Olea europaea L. cv Dezful) under water deficit sress

Abstract