Improvement growth of sapodilla (Achras zapota L.) by chitosan

Abstract

Indonesia’s palm oil production needs to be developed; generative sapodilla cultivation has a very long growth. The effort that can be done to increase the growth of sapodilla seeds for the provision of quality seedlings. Giving chitosan expected to increase the growth of sapodilla seeds because there is chitosan content that accelerate plant growth, and age planting shorter. The aim of this research is to know the concentration and time of spraying of chitosan to be applied to generative sapodilla seeds. The study used Randomized Complete Block Design (RAKL) of 2 factors. The first factor was chitosanic concentration consisting of four levels (0, 2, 4, and 6 mL/L) and the spraying time consisted of three levels (morning, afternoon, and morning and afternoon), each treatment combination was repeated three times. that the concentration of chitosan has significant effect to the leaf area with the best treatment at 6 mL/L concentration and the time of spraying treatment had significant effect on the increase of the number of branches with the best treatment during the morning spraying.

Karyotyping of green, yellow and red matoa (Pometia pinnata J.R.Forst. & G.Forst.) from Central Java, Indonesia

“…Putri et al (2022) reported the similarity of chromosomes in several varieties of Nephelium lappaceum. This result is supported by Yuniastuti et al (2018) that in general the shape of chromosomes has similarities even within one family. The shape of the chromosomes can also be influenced by the translucency of the chromosomes when they are killed.…”

“…The results showed that the three types of matoa (green, yellow, and red) had the same number of chromosomes, namely 22 chromosomes with 11 pairs. According to Yuniastuti et al (2018), the number of chromosomes in one species generally has the same number, shape, and size. The chromosome pairs are known as homologous or diploid (2n) chromosomes.…”

“…Samples used for observation were 12 samples, obtained for each matoa type (green, yellow, red) which were repeated 4 times. The tip of root that has been colored is then dripped with 45% acetic acid (Yuniastuti et al 2018). Followed by maceration (squash) using the tip of a brush or rubber eraser which has previously been covered with cover glass.…”

Effect of Concentration and Time of Chitosan Application on Pachira Breeding (Pachira Aquatica)

“…From the figure 1, it can be seen that in the first and second months the K3W2 treatment gave the fastest height growth response, so it can be said that the use of chitosan at a concentration of 4% and watering in the afternoon can encourage the growth of apical meristems, especially at the beginning of the seedling phase. The application of chitosan at the right time and in the right way will encourage the IOP Publishing doi:10.1088/1755-1315/1018/1/012022 3 growth of apical meristems [6]. In the third month, all treatments gave good results when compared to the control, this indicates that chitosan affects plant growth at the beginning of the phase.…”

The rambutan (Nephelium lappaceum L.) chromosomes

“…According to the results, there are similarities between each pair from each variety. Ideograms can help to clearly show the shape and size of one set of chromosomes (Yuniastuti et al 2018). The karyotype of each individual of one species generally has the same shape and size, but this does not rule out differences.…”