Characterization of Pamelo Leaves ( Citrus maxima ( Burm ) Merr ) Aceh , Indonesia

Pamelo (Citrus maxima (Burm.) Merr) is a type of orange that is prospectively cultivated in Indonesia, including Aceh. Pamelo in Indonesia is very diverse, as the skin of the fruit is green to red, with seed and seedless (Susanto et al., 2011; Rahayu, 2012). Pamelo also has a variety of flavors, some are sweet but some are bitter, the skin is easy to peel and some are not easily peeled. Likewise, with leaves, pamelo plants have a variety of leaves, both shape, size, lamina, and thickness (IPGRI, 1999). The diverse leaf shape between plants shows that the genetic resources of pamelo plants are numerous and varied. Pamelo leaves are ovoid to oval (Susanto, Rahayu, Tyas, 2013; Rai et al., 2015). Information about pamelo aceh plants, especially about the character of leaves is still very limited. This information can be used to determine the characteristics of pamelo aceh so that later it will be very useful in classifying and grouping plants. The purpose of this study was to determine the character of the Pamelo Giri Matang leaf in Aceh, Indonesia. 2. MATERIALS AND METHODS


INTRODUCTION
Pamelo (Citrus maxima (Burm.)Merr) is a type of orange that is prospectively cultivated in Indonesia, including Aceh.Pamelo in Indonesia is very diverse, as the skin of the fruit is green to red, with seed and seedless (Susanto et al., 2011;Rahayu, 2012).Pamelo also has a variety of flavors, some are sweet but some are bitter, the skin is easy to peel and some are not easily peeled.
Likewise, with leaves, pamelo plants have a variety of leaves, both shape, size, lamina, and thickness (IPGRI, 1999).The diverse leaf shape between plants shows that the genetic resources of pamelo plants are numerous and varied.Pamelo leaves are ovoid to oval (Susanto, Rahayu, Tyas, 2013;Rai et al., 2015).
Information about pamelo aceh plants, especially about the character of leaves is still very limited.This information can be used to determine the characteristics of pamelo aceh so that later it will be very useful in classifying and grouping plants.The purpose of this study was to determine the character of the Pamelo Giri Matang leaf in Aceh, Indonesia.

MATERIALS AND METHODS
The study was conducted from September to November 2017.The sample plants were from Pante Lhong Village, Peusangan District, Bireuen District, Aceh, Indonesia.The analysis was conducted at the Laboratory of Agroecotechnology, Faculty of Agriculture, Universitas Malikussaleh.The sample plants used were 15, aged between 10 and 25 years.The tools used are knives, altimeter guard, meters, analytical scales, and cameras.
The research was conducted using descriptive method with sampling by purposive sampling method.Observations are carried out quantitatively and qualitatively based on Descriptors for Citrus (PGRI, 1999).

Leaf Character
Vegetative life cycle of the leaves of the pamelo Giri Matang Aceh plant is an evergreen with a simple leaf division.

ABSTRACT
Pamelo (Citrus maxima (Burm.)Merr) is one type of orange that is prospectively cultivated in Indonesia.Pamelo in Indonesia is very diverse, as the skin of the fruit is green to red, some are with seed and seedless.Pamelo plants have diverse leaves, both in shape, size, lamina and thickness.The various leaf shapes between plants which show below the genetic resources of pamelo plants are numerous and varied.Information about pamelo aceh plants, especially about the character of leaves is still very limited.This information can be used to determine the characteristics of pamelo aceh so that later it will be very useful in classifying and grouping plants.The purpose of this study was to determine the character of the Pamelo Giri Matang leaf in Aceh, Indonesia.The study aims to see the level of diversity of pamelo in the village of Pante Lhong.The study was conducted in the village of Pante Lhong, Peusangan District, Bireuen, District, Aceh, Indonesia and at the Laboratory of Agroecotechnology, Faculty of Agriculture, Universitas Malikussaleh, from September to November 2017.The sample plants used were 15, aged between 10 and 25 years.The research was conducted using descriptive method with sampling by purposive sampling method.Observations were carried out quantitatively and qualitatively based on Descriptors for Citrus (PGRI).The results showed that Pamelo Giri Matang Aceh Indonesia was an evergreen plant with an intensity of green to dark leaf color.The average leaf lamina has a length of 14.62 cm and a width of 7.04 cm with an average area of 59.74 cm 2 .The most commonly found leaf wings are obovate.
Pamelo plants never drop their leaves together in certain seasons, but leaves that fall because they are old.The intensity of green color of laef blades is two, namely medium and dark and almost a draw between the two types.Leaf color variegation is not found on the leaves of the pamelo Giri Matang plant.Leaf lamina are brevipetiolate in which petiole is shorter than leaf lamina (Table 1).

Character of Leaf Lamina
Pamelo Giri Matang leaves have an average length of 14.62 cm lamina, where the shortest is 13.33 cm long and 16.16 cm longest.The width of the lamina leaves between 6.48-7.99cm with an average width of 7.04 cm.The average area of lamina is 59.74 cm 2 with a ratio of 2.11 cm.Pamelo Giri Matang leaves are between 0.27-0.36mm with an average thickness of 0.34 mm (Table 2).
The length of pamelo leaves can reach 15-20 cm with a width of 8.5-12 cm (Rai et al., 2015).Leaf area affects photosynthesis results and reflects the area of photosynthesis.The wider the leaf, the easier it is to get sunlight for photosynthesis.

Shape of the Petiole Leaf
There are three basic forms of petiole wings, including obcordata, obdeltate, and obovate and the most common is obovate.However, many also found the obcordata and obdeltate leaf stalk wings (Table 4).Nambangan and Sri Nyonya type Pamelos which have an average wing shape obcordata (Hardiyanto et al., 2007).The wings of the pamelo petiole are of average medium size, but compared to other types of citrus, pamelo leaf wings are the broadest (Ortiz, 2002).The shape of the wing of the petiole leaf and the mid between the strands and the wing of the leaf can be seen as in Figure 3.

CONCLUSION
Pamelo Giri Matang Aceh Indonesia is an evergreen plant with an intensity of green to dark leaf color.The average leaf lamina has a length of 14.62 cm and a width of 7.04 cm with an average area of 59.74 cm 2 .The most commonly found leaf wings are obovate.