INDIAN JOURNAL OF PURE & APPLIED BIOSCIENCES

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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2020, Volume : 8, Issue : 2
First page : (1) Last page : (7)
Article doi: : http://dx.doi.org/10.18782/2582-2845.7999

Investigations on the Bio-Stimulating Potential of Henna (Lawsonia inermis) on Growth and Oil Yield of Lemongrass (Cymbopogon citratus)

Hind M. Ibrahim¹* and Tagelsir I. M. Idris²
¹Department of Horticulture, Ministry of Agriculture and Natural Resources, Sudan
²Deptartment of Horticulture, Sudan University of Science and Technology, Sudan
*corresponding author e-mail: hindm992@gmail.com
Received: 10.02.2020  |  Revised: 16.03.2020   |  Accepted: 20.03.2020 

 ABSTRACT

This study aimed to investigate the bio-stimulating potential of Henna (Lawsonia inermis) powder and water extracts on the growth and oil yield of Lemon-grass (Cymbopogon citratus) under nursery conditions at Khartoum, Sudan. Henna powder was tested as soil dressing for Lemongrass in doses of: 0, 4, 8, 12 and 16 g/ plant, while tap water extracts of Henna powder were tested as foliar application on Lemon grass in concentrations of: 0, 4, 8, 12 and 16 g/l. The study was arranged in a complete randomized design where each treatment was replicated six times. Data were collected 6 months after treatments. Considerable gains in growth parameters were obtained upon soil dressing with 16g of Henna powder, whereas these parameters were enhanced substantially by the 8 g/l foliar treatment. Further confirmatory tests are needed coupled with phyto-chemical studies to define the active constituents responsible for these enhancements.

Keywords: Lemongrass (Cymbopogon citratus), Henna (Lawsonia inermis), Growth, Oil content

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Ibrahim, H.M. & Idris, T.I.M. (2020). Investigations on the Bio-Stimulating Potential of Henna (Lawsonia inermis) on Growth and Oil Yield of Lemongrass (Cymbopogon citratus), Ind. J. Pure App. Biosci. 8(2), 1-7. doi: http://dx.doi.org/10.18782/2582-2845.7999

INTRODUCTION

Lemongrass (Cymbopogon citratus) is a tall herb belonging to the family Poaceae(Akhila, 2010). It is a tropical perennial plant that yields aromatic oils mainly composed of citral which constitutes about 75% (w/w) of the oil (Huynh et al., 2008; Tajidin et al., 2012). Citral has a citrus aroma and is widely used in the perfume and cosmetics industries as well as pharmaceutical preparations and industrial chemicals synthesis (Mestri, 2006; Prommegger et al., 2005; Rauber et al.,2005). The aqueous extract of Lemon- grass is commonly used as a drink while the whole plant is  incorporated into traditional food for its lemon flavour (Figueirinha et al., 2008). However, this plant is among flora well adapted to Sudan's agro-climatic conditions (ElGhazali et al., 2004) where few research reports on its agronomy indicated the possibility of its production at field level (Jbreel, 2016). However, the commercial production  of this plant in Sudan should be preceded by intensive research efforts.

A plant bio-stimulant is any substance or microorganism applied to plants with the aim to enhance growth and yield attributes. Plant bio-stimulants have been thought to be biological substances that stimulate processes within plants (Saa-Silva 2013). The review of the relevant literature revealed a wide range of growth stimulating compounds including humic and fulvic acids, protein hydrolysates and other N-containing compounds, seaweed extracts, botanicals, chitosan and other biopolymers, beside beneficial fungi and bacteria (Jardin, 2015). The numerous research reports on bio-stimulants documented their positive impact on plant growth, development and productivity, but the mechanism of their action is poorly or not understood (Brown & Saa, 2015; Bulgari et al., 2015). However, most of the interpretations of these enhancements were based on assumptions such as better nutrients uptake, tolerance to biotic and a-biotic stresses, growth regulator-like effects or reactive oxygen/nitrogen species (Patrick 2015). The hormonal–like effects were proposed as causes of enhancements upon application of bio-stimulants (Idris et al.,2011; Colla et al., 2014). Bio-stimulants are safe both for human beings and for the environment and in particular they are valuable for reducing chemicals in agriculture. Reports on growth and yield stimulations in horticultural crops due to their use are frequent under Sudan's conditions (Idris et al., 2011, 2014; Idris & Modawi, 2016).

            Henna (Lawsonia inermis L.) belongs to the family Lythraceae. It is traditionally used to develop a red or black coloring to hands, feet and hair in some occasions such as weddings and religious festivals. It is among flora adapted to growth conditions of Sudan where it had been grown in home gardens as hedges and as ornamental. The cultivation of Henna is practiced in Sudan coupled with processing at a commercial level in the River Nile State. According to phytochemical analysis, the powdered of its leaves contain about 0.5-1.5% lawsone; the chief constituent responsible for the dyeing properties of the plant. Henna plant also contains alkaloids, glycosides, flavonoids, saponin, mannite, tannic and gallic acids, coumarins, mucilage, and naphoquinone (Ahmed et al., 2000; Chukwu et al., 2011; Khan et al., 1991; Kirkland & Marzin, 2003; Nayak  et al., 2007; Rosenberg, 1999; Vardamides et al., 2001). Regarding its bio-stimulating property, Chandrasekaran et al. (2000) mentioned that treatment  of soyabean seed with Lawsonia inermis leaf extract at 10%,  increased shoot length significantly. Besides, Pathak and Srivastava (2000) stated that treating of sunflower with Lowsonia inermis increased its total phenols content. On the other hand, Singh et al. (2006) reported that the extract of Henna gave significant control of the white fly in tomato compared to the untreated control.

In conformity with global trend to replace the synthetic agro-chemicals by natural products to improve growth and productivity of crops, the aim of this study was to investigate the bio-stimulating potential of Henna powder and water extracts on growth and yield of lemon-grass under the conditions of Khartoum State, Sudan.

MATERIALS AND METHODS

This study was conducted in the nursery of  the Horticultural  Sector Administration, Federal Ministry of Agriculture, Khartoum, Sudan to determine the impact of  Henna  soil  and  foliar applications  on the performance of  lemon-grass plants. The lemongrass experimental   materials were obtained from mature field grown plants. Tillers of uniform size and shape were severed to 10 cm length prior to planting in 30X40 cm black polyethylene bags containing alluvial soil. Four weeks after planting, they were used as test material in two separate experiments.  The powder of Henna leaves was tested as soil treatments in rates of 0, 4, 8, 12, and 16 g / lemon-grass transplant. The extracts of dry Henna leaves by tap water were tested as foliar treatments in concentrations of   0, 4, 8, 12, and 16 g/l. The two tests were arranged in completely randomized design with 5 replicates. Six months after applications data were collected for the following parameters: number of leaves, leaf length and width, leaf chlorophyll content, shoot and roots fresh and dry weights and leaves oil content. The leaf chlorophyll   content was determined with the aid of (Spad device) and the oil content was determined according to AOAC (2003).  Data were subjected to analysis of variance and means were separated at 95% confidence limits according to Duncan's Multiple Range Tests with the aid of MStat C computer program.

RESULTS

A.The soil applications:

All Henna soil applications increased the number of leaves significantly over the control. The highest dose (16g/plant) ranked top (Table1). Likewise, all Henna treatments resulted in significant increase in leaf length compared to the control. This parameter was equally enhanced by the 12 and 16 g/plant treatment (Table 1). Regarding leaf width, the best value was recorded for the 4 g/plant Henna treatment, whiles the other treatments induced significant increase over the control at a statistical equal level (Table1). Leaf chlorophyll content was best increased by the 12g /plant treatment compared to other treatments (Table1).

Table 1: Impact of Henna soil applications on the number, length, width and chlorophyll content of Lemongrass leaves

Henna
treatments
(g/plant)

Number
 of
 leaves

Leaf
 length
(cm)

Leaf
width
(cm)

Chlorophyll content

0

47.50C

52.03d

1.450c

30.38d

4

51.75b

58.27c

1.825a

33.60b

8

53.25b

60.50b

1.550b

30.90d

12

52.50b

62.10ab

1.625b

36.63a

16

61.25a

62.38a

1.625b

32.40c

* Means with the same letter (s) in the same column are not significantly different at 95 % confidence limit according to DMRT.

According to Table (2), the 16 g/plant Henna treatment ranked top for the fresh and dry weights of leaves.  The 8 g/plant Henna treatment ranked top for the fresh and dry weights of roots. However, the 8 g/plant treatment ranked second for leaves fresh and dry weights, while the 16 g/plant treatment ranked second for roots fresh and dry weights. The 8 g/plant Henna treatment resulted in significant increase in leaf oil content, while the other Henna treatments were ineffective as promoters of this parameter (Table 2).

Table 2: Impact of Henna soil applications on fresh and dry weights of leaves and roots, and leaf oil content of Lemongrass plant


Henna
treatments
(g/plant)

Leaves fresh weight
(g)

Leaves
 dry
 weight
(g)

Roots fresh weight
(g)

Roots
dry
weight
(g)

Leaves oil content
(%)

0

   087.5e

31.50e

40.13a

33.00ab

0.1667a

4

   156.5d

46.13d

31.63c

25.25d

0.1667a

8

   203.3b

64.38b

39.75a

33.25a

0.2333a

12

   173.1c

59.00c

32.00c

26.88c

0.1667a

16

   312.3a

86.88a

36.75b

31.63b

0.1333a

* Means with the same letter (s) in the same column are not significantly different at 95% confidence limit according to DMRT

B. The foliar applications:

The 8 g/l Henna treatment was the most enhancive for the number of leaves /plant and leaf length. However, all Henna treatments increased the leaf length over the control (Table3). The widest leaves were obtained from the 4 g/l treatment, while the highest leaf chlorophyll content was recorded for the 4 and 8g/l treatments (Table 3).

Table 3: Impact of foliar application of Henna on the number, length, width and chlorophyll content of Lemongrass leaves


Henna
extract
conc. (g/l)

Number
 of
 leaves

Leaf length
(cm)

Leaf
 width
(cm)

Chlorophyll content

0

47.25c

51.78d

1.425bc

30.38c

 4

46.00c

63.63b

1.700a

33.33a

8

81.25a

65.28a

1.525b

33.53a

12

80.00ab

52.15d

1.425bc

30.70bc

16

79.00b

58.22c

1.575b

32.10ab

* Means with the same letter (s) in the same column are not significantly different at 95% confidence limit according to DMRT.

According to (Table 4), all Henna treatments increased leaves fresh and dry weights significantly over the control. The best values were recorded for the 12g/l Henna treatment. The 16g/l Henna treatment also ranked top for both roots fresh and dry weights, followed by 8 g/l Henna treatment. The 4 and 12 g/l treatments were also enhancive for these parameters compared to the control. However, the 4, 8 and 12 g/l Henna treatments resulted in slight but insignificant increase in leaf oil content, while the 16 g/l treatment resulted in slight insignificant decrease compared to the control (Table 4).

Table 4: Impact of Henna foliar applications on fresh and dry weights of leaves and roots, and leaf oil content of Lemongrass plants


Henna
extract
conc. (g/l)

Leaves fresh weight
(g)

Leaves
 dry
weight
(g)

Roots fresh weight
(g)

Roots
dry
weight
(g)

Leaves oil content
(%)

0

087.5e

031.5e

40.13e

33.00e

0.1333a

4

    189.0d

059.3d

46.00d

38.13d

0.1667a

8

313.1b

079.8 c

54.63b

47.13b

0.1667a

12

335.3a

108.8a

50.50c

43.63c

0.1667a

16

306.1c

099.9b

143.0a

111.0a

0.1333a

* Means with the same letter (s) in the same column are not significantly different at 95% confidence limit according to DMRT.

DISCUSSION

The chances of Sudan in the agricultural business are numerous; yet this potential is not fully exploited due to lack of a master plan to exploit the huge resources in accordance with standard modern agribusiness. Hence, there  is need to focus on  environment friendly and sustainable means to increase the productivity per unit area. Organic farming renders better returns than chemically produced crops. In organic production, bio-fertilizer and bio-pesticides are used instead of agri-chemicals to grant provision of safe food without harming the environment. The core and objectives of this study lied within this context as the growth stimulating potential of Henna was tested on Lemongrass; a plant well adapted to Sudan's agro-climatic conditions (ElGhazali et al., 2004). The data analysis of this test revealed substantial growth gains upon Henna application, and this finding might be considered as a first report  claiming of the growth stimulating property of this plant especially when used as foliar treatment in concentration of 12 g/l; a treatment that increased the leaf fresh weight by 352.3% coupled by oil content slightly increased over the control. Likewise, the soil application of 6 g Henna was also stimulating of leaf weight as it increased this parameter by 202% beside significant increase in leaf oil content. The employment of these cheap doses of Henna proved to be of significant impact on growth of Lemongrass and this potential can be tested on other horticultural crops for further confirmation. Regarding interpretation, this stimulation might owe growth   stimulating hormones or their precursors or a bio-pesticide constituent within Henna tissues. Nevertheless, these findings are in line with other preceding studies on the growth stimulation by applications of local flora of Sudan as substitutes for agro-chemicals. Within this context, Idris et al. (2011) reported enhanced growth and yield in date palm by soil application of low doses Argel. Similarly, other researchers reported growth stimulation by soil and foliar applications of local flora on Aloe vera (Eisa, 2016), Catharanthus roseus (Jbreel, 2016), Mangifera indica (Idris and  Albashir, 2018), Duranta plumier (Hamid, 2016) and Euphorbia splendenes  (Osman, 2017).

            However, further research on the growth bio-stimulation potential of Henna is needed. Further phyto-chemical studies to define the phyto-chemicals responsible for the stimulations of growth might provide solid interpretation of the results. Yet, the encouraging high growth rates of Lemongrass obtained in this study might warrant further research on this plant aiming towards its production at an economical level.

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