Articles

Kandungan, Resorpsi N dan P serta Specifi c Leaf Area Daun Kakao (Theobroma cacao L.) pada Cekaman Kekeringan Prihastanti, Erma; Tjitrosemito, Soekisman; Sopandie, Didy; Qayim, Ibnul; Leuschner, Christoph
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 39, No 1 (2011): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

Plant nutrient absorptions depend on their environment and plants’ stage of development. Beside from soil, nutrient absorption also proceed through resorption in leaves. The resorption efficiency varies based on types of habitat. Drought stress also influences the efficiency of nutrient resorption, growth rate, and plant development. The purpose of this research was to study the change of nitrogen (N) and phosphorus (P) content and leaf resorption value of N and P, and specifi  c leaf area of 6-years old cacao  grown under drought stress. Research was carried out in a cacao plantation with 7-years old Gliricidia sepium Jacq. as shading trees. The results showed that drought stress with Troughfall Displacement Experiment (TDE) system did not affect the content and resorption level of N and P of cacao leaves. However, N resorption of cacao leaves tended to increase while P resorption decreased. Cacao plants experienced drought stress have the ability to resorp leaf N for 46.64-50.63%, leaf P  for 47.98-58.40%, whereas, the control plants had the leaf N resorption of 45.05-52.97%, and leaf P resorption of 36.64-44.10%. Drought stress for 13 months on 6-years old cacao did not affect  specific  c leaf area.   Keywords: drought stress, N and P resorption, specifi  c leaf area, Theobroma cacao L.
Efektivitas Konsentrasi Sorbitol dalam Medium Purifikasi dalam Menghasilkan Jumlah Sel Viabel pada Isolasi Sel Mesofil Daun Pegagan (Centella asiatica (L.) Urban). I, Ika Puspitasari; Haryanti, Sri; Haryanti, Sri; Prihastanti, Erma
JURNAL ANATOMI FISIOLOGI Vol 14, No 2 (2006): Vol. XIV, No. 2, Oktober 2006
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

Research abaut used sorbitol on purification media for sum cell viable product and effective sorbitol consentration to highes sum viable cell isolation phase pegagan mesophyl cell. Randomized Complete Design with 6 treatmen and 4 block. Sorbitol consentration in purification media was treatmen 0 g/L, 25 g?L, 50 g/L, 75 g/L, 100 g/L and 125 g/L. Parameter was sum of total cell, sum of viabel cell and cell viability. The result of this experiment indicated that the sorbitol in purification media gave the significant effect on the sum cell viabel and cell viability. Effective sorbitol consentration was 25 g/L with obtain sum cell 13,19 x 107 cell/ml and cell viability 99,39%.
Perkecambahan Biji dan Pertumbuhan Semai Kakao (Theobroma cacao L.) Asal Sulawesi Tengah yang Dibudidayakan di Kabupaten Banyumas Jawa Tengah Prihastanti, Erma
JURNAL ANATOMI FISIOLOGI Vol 19, No 1 (2011) : Volume XIX, Nomor 1, Maret 2011
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

A new area plantation began to grow a new plant species usually do not have a stock of seed that must be imported from outside. Shipping seeds from outside the lower viability at risk. Seed deterioration can be caused by mechanical or physiological damage and very decisive phase of growth and development of the next crop. One way to know the quality is by knowing the percentage of seed germination and seedling growth. This study aims to identify the seed germination and seedling growth of cocoa (Theobroma cacao L.) from Sulawesi, which is planted in the area of Central Java Banyumas. The results show the origin of cocoa beans grown in the Central Sulawesi district of Banyumas can germinate all at day 27 where a good germination of 77.53% and 32.47% unfavorable, while the growth of seedlings until week 10 showed normal seedling growing reached 78.41% and 21.59% poor. Growth of cocoa seedling on medium for 8-week weaning obtained plants with 24-34 cm high and 11 leaves.
Pembibitan Jarak Pagar (Jatropha Curcas L. ) pada Jenis Tanah dan Penambahan Kompos yang Berbeda Prihastanti, Erma
JURNAL ANATOMI FISIOLOGI Vol 18, No 2 (2010): Vol. XVIII, No. 2, Oktober 2010
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

Jatropha (Jatropha curcas L.) is one of the important crop for biofuel industry development and have the nature of drought tolerance that can be cultivated in marginal areas. One of cultivation technology that determines the success of planting jatropha seedlings in the field is the provision of plant nurseries in general use media that is around, such as soil and organic fertilizer. This study aims to observe the growth of jatropha seedlings on soil type and the addition of compost that is different from studies on the growth of leaves and roots. The results showed jatropha plant seedlings grown on soil rendzina, grumosol and regosol given compost or not for two months was able to grow and show the same increase in the number of leaves, wet weight and length of plant roots.
Perkecambahan Biji dan Pertumbuhan Semai Tanaman Jarak Pagar (Jatropha Curcas L.) Prihastanti, Erma
JURNAL ANATOMI FISIOLOGI Vol 18, No 1 (2010): Vol. XVIII, No. 1, Maret 2010
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

The physics nut ( Jatropha Curcas L.) is an economic crop which widely cultivated in the tropics. This plant productivity is very depended from some factors like genetic, cultivation and environmental. One important step in supporting of good physics nut cultivation is in seedling phase that is ready of good quality seed will very determine on efficacy. This research was carried out to investigate the germination of seed and growth of physics nut seedling. The research consists of two experiments with purposes: 1. to investigate the percentage of germination of physics nut seed from Lampung and Mataram on different media; 2. to investigate the seedling growth of physics nut on different of media and percentage of light shading during two months. The result showed that seed from Mataram have higher percentage of germination ( 61-65 %) than from Lampung        ( 25 - 39%). The physics nut seedling which is planted on media mixture beetwen soil and fertilize cage 1:1 and light shading of 40% yielding the quality of best growth
Pengaruh Lama Penyimpanan Terhadap Kadar Gula dan Vitamin C pada Buah Jeruk Siam ( Citrus nobilis var. microcarpa ) Helmiyesi, Helmiyesi; Hastuti, Rini Budi; Prihastanti, Erma
JURNAL ANATOMI FISIOLOGI Vol 16, No 2 (2008): Vol. XVI, No. 2, Oktober 2008
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

The aim of the research is to find out the effect of long storage against glucose and vitamin C degree andalso to find out how many days of the storage whioch can still maintain the glucose and vitamin C degreeupon siam orange ( Citrus nobilis var. microcarpa ). It is expected that the research may give anyinformation especially for the seller of siam orange about the effect of long storage against glucose andvitamin C degree and how many days the storage should be performed. The experimet includes 4 treatmentsand 5 repetilions. The treatment is the length of the storage, namely 0 day ( control ), 5 days, 10 days and 15days. The observed parameters are glucose, vitamin C degree and fruit weight decrease. The research usescomplete Random design, when there is a real difference Duncan test will be used upon significant degree of5 %. The result of the research indicates that the glucose degree of siam orange upon the storage of 5 and 10days increases compared to the control. Upon the storage of        15 days the glucose degree decreases comparedto the storage of 5 and upon the storage of 5 days does not change compared to the control, but it startsdecreasing upon the storage of 10 and 15 days.
Pengaruh Suhu dan Lama Penyimpanan Daun Stephania hernandifolia Walp. terhadap Kualitas Bahan Baku Cincau dan Penerimaan Konsumen Roiyana, Munirotun; Prihastanti, Erma; Kasiyati, Kasiyati
JURNAL ANATOMI FISIOLOGI Vol 19, No 2 (2011): Volume XIX, Nomor 2, Oktober 2011
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

Cincau is one of the gel-formed foods which is obtained from squeezing of certain leaves in the water. One of the plants that can be made to cincau is Stephania hernandifolia Walp. The obstacle faced in the making of cincau is the availability of cincau plant. At now days, it is difficult to get the cincau plant and also the handling of this plant has to be done carefully. Post-harvesting technique to keep the quality of cincau’s raw material is by storing at low temperature. Storing at low temperature can lengthen the storage time of the plant and maintain its fresh condition.  The aim of this research was to study the effect of storing the leaves at different temperature and time towards the percentage of yellowing area, vitamin C content and chlorophyll content of Stephania hernandifolia Walp. leaves, and also to determine the characteristics of cincau’s organoleptics. The research was done at Laboratory of Biology Structure and Function of Plant, Biology Department – Faculty of Mathematics and natural sciences, Diponegoro University in 2010. Complete Random Design with 3 x 2 factorial and three times repetition was used in this research. The first factor is time of storage which consists of 1, 3 and 5 days. The second factor is temperature of storing which consists of 14ºC and 28ºC. The data obtained was analysed with ANOVA, if there was difference then further test was done with Duncan test with 95% level of significance. Result showed that interaction between temperature and storage time affected the area of leaves yellowing and vitamin C content. The higher the temperature and the longer storage time widened the yellowing of the leaves. The chlorophyll content only affected by the time of storage. The organoleptics results indicated that the panelists prefered the cincau which was kept at 14ºC for 3 days. Key Word : Stephania hernandifolia Walp., yellowing area, chlorophyll , vitamin C, organoleptics.
Pengaruh Kombinasi Urutan Daun Stephania hernandifolia Walp. dan Penambahan Volume Air terhadap Kualitas dan Sineresis Cincau selama Penyimpanan Ningtyas, Putri Zulaida; Prihastanti, Erma; Saptiningsih, Endang
JURNAL ANATOMI FISIOLOGI Vol 19, No 2 (2011): Volume XIX, Nomor 2, Oktober 2011
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

Cincau is a kind of jelly food that is included in functional foods. Stephania hernandifolia Walp. is one type of plants that can be used in cincau production. Cincau was produced from squeezing of S. hernandifolia leaf which has been mixed with water. The sequence of leaves when picking it and the addition of water volume can affect the quality of cincau. This research aims to know the effect of S. hernandifolia combination sequence leaves and addition of water volume in cincau production towards the coagulation time, fiber content, vitamin C content and  chlorophyll content, and also to know the syneresis and shrinkage of cincau mass in the different storage time. The research was done at Laboratory of Biology Structure and Function of Plant, Biology Department – Faculty of Mathematics and natural sciences, Diponegoro University in 2011. The design that is used in this research is Completely Randomized Design (CRD) pattern 2 x 3 factorial. Data were analysed by Analysis of Variance (ANOVA) and then continued by Duncan test with 95% level of significance. The result showed that the interaction of the combination sequence leaves and addition of water volume has no effect on coagulation time, chlorophyll, fiber, and cincau vitamin C. The storage time affects the syneresis and shrinkage of cincau mass. Key word : Stephania hernandifolia Walp., cincau, syneresis, shrinkage of mass.
PERUBAHAN STRUKTUR DAN KEPADATAN TRIKOMATA NON GLANDULER SERTA LUAS DAUN KAKAO (Theobroma cacao L.) PADA PERLAKUAN STRES KEKURANGAN AIR Prihastanti, Erma; T, Soekisman; Soepandi, Didie; Qayim, Ibnul
JURNAL SAINS DAN MATEMATIKA Volume 17 Issue 1 Year 2009
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRACT--Cacao  is the one  important  crop in Indonesia. Water  stress  is perhaps  the major factor  limiting  crop growth. Plant responses to water stress  include morphological of biochemical changes. This reserch was aimed studying  strtructure and density of non glanduler  trichomes, and leaf area on cacao leaves on drought experiment.  The drought studies used throughfall displacment experiment  (TDE). The result show that cacao leaves have non glanduler trichomes type stellat. Non Glanduler trichomes were distributed throughtout the vein of leaves with distribution in abaxial parts of the leaves. TDE give non significant effect to trichomes density and Ieaf area. The highest trichomes  happened  on March 2008  6.9861/cm2. Leaf area on shade Ieaves  (273,56 cm2) more higher than sun leaves  (235,50 cm2). Keyword : Trichomes  non  glanduler, cacao leaves, leaf area
Artikel Kajian PERANAN DAN POLA AKUMULASI PROLINE TANAMAN PADA ADAPTASI CEKAMAN KEKERINGAN Prihastanti, Erma
Prosiding Seminar Biologi Vol 8, No 1 (2011): Seminar Nasional VIII Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

ABSTRAK Para ahli klimatologi memperkirakan dampak pemanasan global akan menyebabkan terjadinya periode kekeringan yang lama. Periode kekeringan sering berasosiasi dengan peristiwa ENSO (El Nino Southern Oscillation). Dibanding dekade sebelumnya, peristiwa ENSO diramalkan akan lebih sering terjadi di masa datang.  Saat musim kering panjang dan berasosiasi dengan peristiwa ENSO sering diiringi oleh penurunan pertumbuhan bahkan kematian tanaman. Tanaman yang mengalami cekaman kekeringan akan berusaha untuk melakukan perubahan-perubahan fisiologi sebagai bentuk adaptasinya. Salah satu bentuk adaptasi tersebut adalah kemampuan tanaman untuk mempertahankan tekanan osmotik dengan mengakumulasi senyawa osmolit  sel sebagai respon terhadap perubahan potensial air dari lingkungan sel. Sebagai konsekuensi dari akumulasi ini, potensial osmotik sel lebih rendah dan cenderung untuk menjaga tekanan turgor. Proline bebas sering terakumulasi selama tanaman mengalami kekeringan yang disebabkan oleh aktivasi biosintesa  dan inaktivasi  degradasi proline. Seringkali peningkatan jumlah proline  dianggap merupakan indikasi toleransi terhadap  kekeringan. Namun demikian masih terjadi kontrovesi tentang fungsi proteksi dari akumulasi proline karena beberapa kasus menunjukkan jika terjadi  over produksi proline justru dapat berakibat buruk saat tanaman menghadapi kondisi cekaman kekeringan. Tulisan ini bertujuan mengkaji peranan dan pola akumulasi proline pada tanaman dalam menghadapi cekaman kekeringan.   Kata Kunci : Proline, pola akumulasi prolin, cekaman kekeringan