Polymorphism and structure of style-specific arabinogalactan proteins as determinants of pollen tube growth in Nicotiana.

ABSTRACT:

Background

Pollen tube growth and fertilization are key processes in angiosperm sexual reproduction. The transmitting tract (TT) of Nicotiana tabacum controls pollen tube growth in part by secreting pistil extensin-like protein III (PELPIII), transmitting-tract-specific (TTS) protein and 120 kDa glycoprotein (120 K) into the stylar extracellular matrix. The three arabinogalactan proteins (AGP) are referred to as stylar AGPs and are the focus of this research. The transmitting tract regulates pollen tube growth, promoting fertilization or rejecting pollen tubes.

Results

The N-terminal domain (NTD) of the stylar AGPs is proline rich and polymorphic among Nicotiana spp. The NTD was predicted to be mainly an intrinsically disordered region (IDR), making it a candidate for protei

SUBMITTER: Noyszewski AK 

PROVIDER: S-EPMC5553597 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature