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All Journal REKAYASA Jurnal Penelitian Sains
Mukhamad Su'udi
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Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Electrical & Electronics Engineering Engineering Mathematics Physics

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Translokasi Asimilat Pada Anggrek Akar Veren Yuliana Saputri; Ratis Nour Sholichah; Lailatus Solichah; Muhammad Ainun Najah; Mukhamad Su'udi
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.227 KB) | DOI: 10.56064/jps.v22i1.553

Abstract

Anggrek akar hidup pada habitat lembab dan bersifat epifit. Anggrek yang juga dikenal sebagai anggrek hantu ini, memiliki ciri khusus yaitu akar yang berfungsi sebagai organ source. Salah satu contoh anggrek akar adalah Taeniophyllum biocellatum. Akarnya berwarna hijau, memiliki velamen, dan berkas pembuluh yang memainkan peran penting dalam proses translokasi hasil asimilat. Proses translokasi asimilat dimulai dari sel produsen menuju sieve element dan berakhir di organ sink. Tipe pengangkutan simplasmik dan apoplasmik didasarkan pada ada atau tidaknya saluran plasmodesmata. Senyawa yang terkandung dalam fotosintat meliputi zat organik seperti sukrosa, hormon, dan protein sedangkan senyawa anorganik meliputi air, mineral, nitrogen, dan lainnya. Alokasi dan proporsi fotosintat disesuaikan pada kebutuhan dominan pertumbuhan dan perkembangan anggrek akar.
Review Aktivitas Fotosintesis pada Tanaman Sorgum (Sorghum bicolor) dalam Kondisi Cekaman Kekeringan Mukhamad Su'udi; Arsetyo Rahardianto; Miatin Alvin Septianasari; Veren Yuliana Saputri; Dwi Setyati; Fuad Bahrul Ulum
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.9799

Abstract

Sorghum (Sorghum bicolor L. Moench) is a cereal crop that has the potential to be developed in Indonesia as a food, feed and industrial crop. Sorghum is a C4 plant that has the advantage of efficiency in hot and dry environments. Drought stress is one of the most limiting environmental factors for crop productivity worldwide, and can be caused by water deficits in the soil and in the atmosphere. On the decreasing leaf water status, the rate of CO2 assimilation and the conductance of stomata decreased rapidly. The CO2 concentration mechanism is able to saturate C4 photosynthesis under the relatively low intercellular CO2 concentration. In addition, CO2 photorespiration is likely to be repaired before it exits the bundle sheat cells. The effects of non-stomatal factors include reduced activity of photosynthetic enzymes, inhibition of nitrate assimilation, induction of premature aging, and changes in leaf anatomy. Photosynthesis in C4 plants, including sorghum, involves, others, the PEPC and Rubisco enzymes. Drought can also trigger oxidative stress, which is an environmental condition that has increased Reactive Oxygen Species (ROS) due to an over reduction of the photosynthesis process.
Co-Authors Arsetyo Rahardianto Dwi Setyati Fuad Bahrul Ulum LAILATUS SOLICHAH Miatin Alvin Septianasari Muhammad Ainun Najah Ratis Nour Sholichah Veren Yuliana Saputri