PERAN FOTORESEPTOR PADA TROPISME TANAMAN SEBAGAI RESPON TERHADAP CAHAYA

Yenni Asbur

Abstract


Tanaman menggunakan cahaya untuk menghasilkan energi kimia melalui fotosintesis. Dalam rangka untuk mendapatkan kondisi optimum pada proses fotosintesis, tanaman memodulasi bentuk untuk memaksimalkan jumlah cahaya yang diterima selama hidupnya. Fototropisme adalah salah satu contoh yang khas dalam memodulasi bentuk dan mudah diamati di bawah kondisi alam. Tulisan ini merupakan review dari berbagai artikel ilmiah sehingga bahan dan metode tidak dijelaskan. Beberapa hasil penelitian menunjukkan bahwa respon tanaman terhadap arah rangsangan cahaya yang disebut fototropisme diperantarai oleh tiga jenis fotoreseptor cahaya, yaitu fototropin, fitokrom dan kriptokrom. Fototropin dan kriptokrom merupakan fotoreseptor cahaya biru/UV-A, sedangkan fitokrom merupakan fotoreseptor cahaya merah. Respon tanaman terhadap cahaya, umumnya sama, yaitu mengakibatkan terjadi respon fototropisme pada daun, batang, petiolus maupun hipokotil. Pada daun, umumnya respon fototropisme berupa pergerakan daun ke arah cahaya ataupun perubahan posisi daun menghadap cahaya dan bentuk daun yang merata. Demikian pula yang terjadi pada batang, petiolus maupun hipokotil

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References


Ahmad, M, Lin, C and Cashmore, AR. 1995. Mutations Throughout an Arabidopsis Blue-Light Photoreceptor Impair Blue-light-responsive Anthocyanin Accumulation and Inhibition of Hypocotyl Elongation. Plant J. 8: 653–658.

Botto JF, Alonso-Blanco C, Garzaron I, Sanchez RA, Casal JJ. 2003. The Cape Verde Islands Allele of Cryptochrome2 Enhances Cotyledon Unfolding in The Absence of Blue Light in Arabidopsis. Plant Physiol 133: 1547–1556

Casal JJ. 2000. Phytochromes, Cryptochromes, Phototropin: Photoreceptor Interactions in plants. Photochem Photobiol 71: 1–11

Carbonnel, M, Phillip D, M. Rob GR, Shin-ichiro I, Isabelle S, Patricia L, Markus G, Kenichiro S, Roger H, and Christian F. 2010. The Arabidopsis Phytochrome Kinase Substrate2 Protein Is a Phototropin Signaling Element that Regulates Leaf Flattening and Leaf Potitioning. Plant Physiol 152:1391-1405.

Chatterjee, M, Pooja S, and Jitendra PK. 2006.Cryptochrome1 from Brassica napus Is Up-Regulated by Blue Light and Control Hypocotyl/Stem Growth and Anthocyanin Accumulation. Plant Physiol 141:61-74.

Devlin PF, Kay SA. 1999. Cryptochromes: Bringing The Blues to Circadian Rhythms. Trends Cell Biol 9: 295–298

Devlin PF, Kay SA. 2000. Cryptochromes are Required for Phytochrome Signaling to The Circadian Clock but not for Rhythmicity. Plant Cell 12:2499–2510

Franklin, KA, and PH Quail. 2010. Phytochrome Functions in Arabidopsis Development. Darwin Review. Journal of Exp.Botany 61(1):11-24.

Giliberto L Perrotta G, Pallara P,Weller JL, Fraser PD, Bramley PM, Fiore A, Tavazza M, Giuliano G. 2005. Manipulation of The Blue Light Photoreceptor Cryptochrome 2 in Tomato Affects Vegetative Development, Flowering tTme, and Fruit Anti-oxidant Content. Plant Physiol 137:199–208

Guo H, Yang H, Mockler TC, Lin C. 1998. Regulation of Fowering Time by Arabidopsis Photoreceptors. Science 279: 1360–1363

Guo H, Duong H, Ma N, Lin C. 1999. The Arabidopsis Blue Light Receptor Cryptochrome 2 is a Nuclear Protein Regulated by a Blue Light Dependent Post-translational Mechanism. Plant J 19: 279–287

Hsu DS, Zhao X, Zhao S, Kazantsev A, Wang RP, Todo T, Wei YF, Sancar A. 1996. Putative human blue-light photoreceptors hCRY1 and hCRY2 are flavoproteins. Biochemistry35 (44): 13871–7.

Inoue, S, T Kinoshita and K Shimazaki. 2005. Possible Involvement of Phototropins in Leaf Movement of Kidney Bean in Response to Blue Light. Plant Physiol 138:1994-2004.

Inoue, S, T Kinoshita, A Takemiya, M Doi, and K Shimazaki. 2008. Leaf Positioning of Arabidopsis in Response to Blue Light. Molecular Plant 1(1):15-26.

Kagawa, T., Mitsuhiro K., and Masamitsu W. 2009. Blue Light-Induced Phototropism of Inflorescence Stems and Petiole is Mediated by Phototropin Family Members phot1 and phot2. Plant Cell Physiol 50(10):1774-1785.

Kozuka, T, G Horiguchi, GT Kim, M Ohgishi, T Sakai and H Tsukaya. 2005. The Different Growth Responses of The Arabidopsis thaliana Leaf Blade and The Petiole During Shade Avoidance are Regulated by Photoreceptors and Sugar. Plant Cell Physiol 46(1):213-223.

Matsuoka, D, and Takutomi S. 2005.Blue Light-Regulated Moleculer Switch of Ser/Thr Kinase in Phototropin. Pnas 102(37):13337-13342.

Millar AJ. 2003. A Suite of Photoreceptors Entrains The Plant Circadian Clock. J Biol Rhythms 18: 217–226

Mockler TC, Guo H, Yang H, Duong H, and Lin C. 1999. Antagonistic Actions of Arabidopsis Cryptochromes and Phytochrome B in The Regulation of Floral Induction. Development 126: 2073–2082

Schepens, I, Herna´n E. Boccalandro, Chitose Kami, Jorge J Casal, and Christian F. 2008. Phytochrome Kinase Substrate4 Modulates Phytochrome-Mediated Control of Hypocotyl Growth Orientation. Plant Physiol 147:661-671.

Srivastava, ML. 2002.Plant Growth and Development.Hormone and Environment.Copyright 2002. Elsevier Science (USA). p717-756.

Sullivan JA, and Deng XW. 2003. From Seed to Seed: The Role of Photoreceptors in Arabidopsis Development. Dev Biol 260: 289–297

Whippo, CW, and RP Hangarter. 2006. Phototropism : Bending towards Enlightment. Historical Perspective Essay. Plant cell 18:1110-1119.

Yang HQ., Wu Y, Tang RH, Liu D, Liu Y, and Cashmore AR. 2000. The C-termini of Arabidopsis Cryptochrome Mediate a Constitutive Light Response. Cell 103: 815–827




DOI: https://doi.org/10.30743/agriland.v6i2.1226

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