@Article{phyton.2019.04577,
AUTHOR = {Chengcheng Li, Chan Zhou, Yunfei Yang},
TITLE = {Growth and production characters of elymus cylindricus in different shortening heading time},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {88},
YEAR = {2019},
NUMBER = {1},
PAGES = {55--61},
URL = {http://www.techscience.com/phyton/v88n1/33385},
ISSN = {1851-5657},
ABSTRACT = {Ramet modules in a certain population differ in terms
of functions, which accounts for different contributions of the same
ramets. Shortening heading time brings about different contributions
of such modules. Ramets heading one after another were treated as a
continuum in respective cohorts of Elymus cylindricus aged two. The
reproductive ramets that head earlier were marked with tags every
four days during the whole heading stage from the beginning to the
end, after which all the labeled ramets at the maturity period were
gathered. The results showed that, the height and biomass of ramets,
the length and biomass of inflorescences, percentage of inflorescence
length to ramet height, percentage of inflorescence biomass to
ramet biomass, the number and biomass of seeds, seed-setting rate,
and percentage of seed biomass to ramet biomass declined with
the increasing intensity of heading time shortening as displayed
with linear or quadratic function. Ramet characteristics weakened
remarkably when shortened heading time added up to 17 days. The
biomass distribution in relation to inflorescence and seed maintain
a stable rate at the early heading stage and dwindled quickly at
the near-end stage, but the biomass of ramets remain constant
throughout the entire heading stage. The ramets with earlier heading
time make greater contribution to the survival of population
than the shortened heading time in this species of bunchgrass.},
DOI = {10.32604/phyton.2019.04577}
}