1.Izibani zezitshalo zishintsha ukukhanya kwelanga endaweni yokukhanya okuzenzela ukuze kuqinisekiswe ukukhula okunempilo kwezitshalo.Ngaphandle kokukhanya, izitshalo azikwazi ukukhula.Ezitshalweni, ukukhanya kusebenza njengesignali yemvelo yokulawula uchungechunge lokukhula kwezitshalo nokuziphatha kokuthuthuka, okuhlanganisa ukuhluma kwembewu, ukwakhiwa kwe-morphological, ukuqhakaza kanye nokuhlanganiswa kwama-metabolites esibili.Phakathi nalesi sikhathi, izitshalo ze-photosynthesis zimunca ukukhanya kwelanga, zikuguqule kube ushukela, zikugcine, futhi zikusebenzise ekukhuleni.

2.Ngokusebenzisa "ukuhlonza" kanye "nokuncamelayo" kokukhanya, isiqondiso setiyetha singanikezwa ukuze kutshalwe ukukhanya okwenziwa kwezitshalo.Izibani zokukhula kwezitshalo zingaklanywa ngokunembile isitshalo ngasinye noma isikhathi ngasinye sokukhula, futhi amafomula okukhanya kwezitshalo enziwe ngendlela efanele angatshala izitshalo ngokuphumelelayo futhi anikeze ukukhanya okwanele kanye nomanyolo wokukhula kwezitshalo.

Izibani ezikhulayo ze-3.Plant azikwazi nje ukuthuthukisa izinga lokusetshenziswa kwamandla okukhanya kwezitshalo, ukwandisa ukukhiqizwa, kodwa futhi zithuthukise ukuma nombala wezitshalo, izingxenye zangaphakathi, njll. Isetshenziswe kabanzi ezinambuzane nakweminye imikhakha.Amalambu okukhula kwezitshalo asebenza kahle kakhulu, ahambisana namasu okulawula ukukhanya ahlakaniphile futhi athuthukisiwe, enza ukukhula kwezitshalo kungavinjelwe izimo zokukhanya kwemvelo, okubaluleke kakhulu ekuthuthukiseni ukukhiqizwa kwezolimo kanye nokuqinisekisa ukuphepha kwemikhiqizo yezolimo.

Ukufingqa, izibani ezikhulayo ziwusizo kakhulu ekukhuleni kwezitshalo kanye nesivuno kunokukhanya kwemvelo.