Abstract
A pot experiment was conducted to study the ecological significance of redundancy in tillers of winter wheat and effect of reducing redundancy on water use efficiency by clipping some tillers of winter wheat and simulating environmental disturbance at two growing stages(jointing stage and heading stage).Plants were subjected to three treatments:(A) the main stem and the biggest tiller were retained,clipping all other tillers at jointing stage;(B)all small tillers were retained,clipping main stem and two bigger tillers at jointing stage;(C)all barren tillers were retained,clipping main stem and fertile tillers at heading stage.The undisturbed plants were considered the controls(CK).At flowering stage,the chlorophyll content,chlorophyll fluorescence parameters,stomatal conductance and transpiration rates were measured to evaluate the physiological and biochemical activity of winter wheat.The results showed physiological and biochemical activity of barren tillers could restore to the level of fertile shoots after clipping the main stem and big tillers.It is clear that barren tillers can afford to supplement and substitute for fertile shoot in physiological and biochemical activity at flowering stage.At maturity,although the uniform degree of plant height and spike weight,spike number and grain yield decreased significantly,which had no influence on propagation of the next generation.Therefore,tillers redundancy ensured that the disturbed plant can propagate and decrease the risk of plant extinction.After clipping barren tillers,the yield was unaffected,but water use efficiency for grain yield increased by about 10% compared to the control.It is shown that tiller redundancy is unfavorable to water use efficiency while reducing redundancy by taken some suitable agricultural measures is helpful to improve water use efficiency of crop.
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Claims 5
Claim · model-written summary
After main stem and big tillers were clipped, barren tiller physiological activity recovered to that of fertile shoots.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- clipping the main stem and big tillerse0
- Outcome
- physiological and biochemical activity of barren tillerse0
- Direction
- restore to the levele0
- Comparator
- fertile shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiological and biochemical activity of barren tillers could restore to the level of fertile shoots after clipping the main stem and big tillers.”
t0“winter wheat”
t1“(C)all barren tillers were retained,clipping main stem and fertile tillers at heading stage.The undisturbed plants were considered the controls(CK).”
Claim · model-written summary
After tiller clipping, plant height uniformity, spike weight, spike number, and grain yield significantly decreased.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- clipping main stem and fertile tillerst1
- Outcome
- uniform degree of plant height and spike weight,spike number and grain yielde0
- Direction
- decreasede0
- Comparator
- controls(CK)t1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the uniform degree of plant height and spike weight,spike number and grain yield decreased significantly”
t0“winter wheat”
t1“(C)all barren tillers were retained,clipping main stem and fertile tillers at heading stage.The undisturbed plants were considered the controls(CK).”
Claim · model-written summary
Clipping did not prevent propagation of the next generation.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- clipping main stem and fertile tillerst1
- Outcome
- propagation of the next generatione0
- Direction
- no influencee0
- Comparator
- controls(CK)t1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which had no influence on propagation of the next generation.”
t0“winter wheat”
t1“(C)all barren tillers were retained,clipping main stem and fertile tillers at heading stage.The undisturbed plants were considered the controls(CK).”
Claim · model-written summary
Clipping barren tillers did not affect yield.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- clipping barren tillerse0
- Outcome
- yielde0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After clipping barren tillers,the yield was unaffected”
t0“winter wheat”
t1“(C)all barren tillers were retained,clipping main stem and fertile tillers at heading stage.The undisturbed plants were considered the controls(CK).”
Claim · model-written summary
Clipping barren tillers raised grain yield water use efficiency by about 10% versus control.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- clipping barren tillerse1
- Outcome
- water use efficiency for grain yielde0
- Direction
- increasede0
- Value
- about 10%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water use efficiency for grain yield increased by about 10% compared to the control.”
t0“winter wheat”
t1“(C)all barren tillers were retained,clipping main stem and fertile tillers at heading stage.The undisturbed plants were considered the controls(CK).”
e1“After clipping barren tillers,the yield was unaffected”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.