Mekanisme Adaptasi
6. Peningkatan konsentrasi total nitrogen daun, N terlarut lebih rendah, protein kloroplas dan protein membran tilakoid yang lebih tinggi serta
penurunan/gradasi ketebalan pita protein pada kloroplas dan membran tilakoid diindikasi sebagai regulator fisiologis yang terkait dengan mekanisme adaptasi fisiologis genotipe toleran terhadap naungan.
SARAN
Kloroplas dan membran tilakoid merupakan organ yang sangat penting dalam merespon kondisi lingkungan cahaya yang rendah, dan sebagian besar komponen protein fotosintetik yang terlibat di dalam proses fotosintesis berada dalam membran ini. Untuk itu perlu penelitian lanjutan ke arah pola ekspresi gen-gen fotosintetik yang memiliki daya adaptasi terhadap kondisi naungan.
Kompleks protein yang paling responsif terhadap kondisi cahaya rendah adalah kompleks protein pigmen pemanen-cahaya (LHC II) fotosistem II (PS II), sehingga perlu mempelajari lebih dalam tentang protein-pigmen yang berada pada fotosistem II maupun fotosistem I. Penelitian ke arah ini, akan lebih berpeluang untuk menjawab mekanisme aklimatisasi tanaman terhadap lingkungan cahaya rendah (naungan).
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