Before us is mishnah 8 in chapter 3 of Maseches Orlah. Some texts open this mishnah with the word "keitzad" (how so?), which shows that it builds on the previous mishnah: there we learned that according to the Chachamim there are certain items that are never nullified, and here the mishnah asks - how so? Under what circumstances are these items not nullified? The answer: when they are whole.
And what is the law regarding items that are not whole:
"Nitpatz'u ha'egozim" - the nuts mentioned in the previous mishnah were cracked open.
"Nitpardu harimonim" - the pomegranates were broken apart into pieces.
"Nitpatchu hechaviyos" - the sealed jars of wine were opened.
"Nitchatchu hadeluim" - the gourds were cut into pieces.
"Nitparsu hakikaros" - the loaves of bread, which are counted according to Rabbi Akiva, were cut into pieces.
"Ya'alu b'echad umasayim":
In all of these cases, once the items are cut and no longer whole, they are nullified one in two hundred. They no longer retain their importance - the very importance that had prevented them from being nullified - and instead their law is like that of any other orlah or kilei hakerem, which are subject to nullification.
In summary: in this mishnah we learned that the importance of those items that are never nullified depends on their being whole. Once the nuts were cracked open, the pomegranates broken apart, the jars opened, the gourds cut up or the loaves sliced - their importance is lost, and their law reverts to that of all other orlah and kilei hakerem, which are nullified in two hundred.