VOLUME 1, ISSUE 2, 2022 78
NOVEMBER, 2022 FOTOPERIODIZM, FOTOTROPIZM, FOTONASTIYA HODISALARINING O'SIMLIKLAR HAYOTIDA AHAMIYATI. Xoshimova Nasiba Gulomatovna Farg'ona davlat universiteti zootexniya va agronomiya kafedrasi o'qituvchisi. Davlatova Dilnoza Xabibilloyevna Mustaqil tadqiqotchi. Annotatsiya: Fototpropizm - oʻsimlik oʻsish organlarining yorugʻlik nuri yoʻnalishiga yoki teskari tomonga harakatlanishi. Musbat va manfiy fototropizm aniqlangan: oʻsimlik organlarining yorugʻlik manbai tomonga qarab burilishi musbat, yorugʻlik manbaidan teskari tomonga qarab burilishi manfiy fototropizm boʻladi. Fotoperiodizm organizmlarning kechaning uzunligiga yoki qorong'u davrga fiziologik reaksiyasi. Fotoperiodizmni o'simliklarning yorug'lik va qorong'u davrlarning nisbiy uzunliklariga rivojlanish reaksiyalari sifatida ham aniqlash mumkin. Ushbu tezisda, fotoperiodizm, fototropizm fotonastiya hodisalarining o'simliklar hayotida ahamiyati haqida fikr va mulohazalar yuritiladi. Kalit soʻzlar: Fototropizm, fotonastiya, fotoperiodizm, o'simliklar, yorug'lik, o'simlik organlari, tuproq. https://doi.org/10.5281/zenodo.7238194 THE SIGNIFICANCE OF PHOTOPERIODISM, PHOTOTROPISM, PHOTONASTY PHENOMENA IN THE LIFE OF PLANTS. Khoshimova Nasiba Gulomatovna Fergana State University, Department of Zootechnics and Agronomy teacher. Davlatova Dilnoza Khabibilloyevna Independent researcher. - Annotation: Phototropism is the movement of plant growth organs in the direction of light or in the opposite direction. Positive and negative phototropism are defined: the turning of plant organs towards the light source is positive, and the turning away from the light source is negative phototropism. Photoperiodism is the physiological response of organisms to the length of the night or the dark period. Photoperiodism can also be defined as the developmental responses of plants to the relative lengths of light and dark periods. In this thesis, thoughts and opinions about the importance of photoperiodism, phototropism and photonasty phenomena in the life of plants are discussed.