yields, since roots serve as an interface between
plants and the soil (Vamerali, 2003).
At the present time, good land for the agricultural
sector is decreasing. Agricultural extensification
leads to the use of problematic land, such as land that
has a high salinity which is widely found in Indonesia
in the form of coastal areas, estuaries and land that
have tidal influences.
Plant breeding methods in vitro culture techniques
can be used as an alternative in helping the plant
breeding purposes get salinity resistant stress plants.
Selection in vitro can be done by determination of salt
density lethal dose, salinity stability tolerance
screening, and regeneration and evaluation of
salinity-resistant plant yield. The study of plant
responses to salinity is important in effective crop
screening efforts. Screening in vitro can be used as a
preliminary screening of a number of genotypes to
see the effect of acidity on physiological,
morphological and plant growth processes. Early
screening with this tissue culture technique can be
followed by field screening for more precise
screening of varieties.
NaCl is the main salt in saline resistance, which
makes NaCl as the salt used in the treatment of
salinity stress. Inducing salinity stress in aquaculture
plants through the use of NaCl salts as selective
agents allows the selection or screening of plants
tolerant to salt stress. The higher the induced NaCl,
the surviving plants, the more tolerant the salts stress
(Efendi et al, 2012).
Seeds are carriers of declining properties,
including the resilience of saltiness. In addition,
germination is the initial process of plant growth.
Therefore, the less resistant or resistant properties of
plants to saltiness can be seen since seed germination.
Based on the description above, the purpose of this
study was to screen various types of cayenne pepper
for salinity stress in vitro by using agents in NaCl in
the planting medium. This study is the initial stage of
the plant breeding project activities to produce
superior varieties of cayenne pepper which are
resistant to salinity.
2 MATERIALS AND METHODS
2.1 Place, Materials and Tools
This research was conducted at Plant Culture Tissue
Laboratory, Agro-technology Study Program Faculty
of Agriculture, University of North Sumatra, Medan.
The materials used in this study include the seeds of
cayenne pepper used by many farmers in North
Sumatra, namely the seeds of Tetra Hijau, MS
medium: macronutrient stock solution; micronutrient
stock solution, vitamin stock solution, iron stock
solution, myoinositol, 3% sucrose and 0.8% agar.
Materials for sterilizing seeds are alcohol, sterile
aquadest, detergent, dithane, benlate, chlorox, iodine
and tween 20. Buffer material pH: NaOH 0,1 N and
HCl 0.1 N. label paper, pH indicator paper, aluminum
foil, paper tissue and filter paper.
This research uses a Factorial Randomized
Complete Random (RAL) with two treatments,
namely NaCl concentration with 5 (five) levels (G0:
0, G1: 2500, G3: 5000, G4: 7500 and G5: 10000 ppm)
NaCl, and various types of cayenne varieties (V1:
Tetra Hijau, V2: Pedas, V3: Cakra Hijau, V4:
Sigantung, V5: Wijaya, V6: Sapade, V7: Sret, V8:
Bara, V9: Genie, and V10: Hanna).
2.2 Preparation Medium Culture
The media used in this study were MS solid medium,
3% sucrose, 0.8% agar with pH 5.8 before autoclave
papa sterilization. The saline treatment conditions
were carried out with the addition of NaCl in
accordance with the prescribed treatment
concentration. The treatment medium is placed in a
100 ml volume bottle of 20 ml each bottle. The
culture medium was sterilized using an autoclave
with a pressure of 17.5 psi, 121ºC for 15 minutes.
2.3 Aseptic Culture Technique
The chilli seeds were shaken in a 30 g/L detergent
solution of distilled water for 30 minutes, then rinsed
with distilled water three times. Further sterilization
of chili seeds in Laminar Air Flow Cabinet aseptic.
The seeds were sterilized in a benlate solution of 2
g/L for 15 minutes, and afterwards rinsed with
aquadest three times. The seeds were sterilized with
20% clorox solution for 10 minutes, and soaked in
10% betadine solution for 5 minutes, then rinsed with
aquadest three times. The sterilized seed is added in a
sterile petridish which has four sheets of filtered
paper and is moistened with sterile aquadest and then
covered with petridish and wrapped with plastic
wrapping to prevent contaminants from entering the
petridish when the seeds are added. Two days after
the seeds germinate, the sprouts are transferred into
the MS medium that has been given treatment.
Subsequently culture was placed on a culture rack
inside the culture room with a temperature of 24 ± 2 º
C.
The parameters used in this study were plant
height (cm), root length (cm), number of leaves,