An early transient water deficit reduces flower number and pod production but increases seed size in chickpea (Cicer arietinum L.)
An early transient water deficit reduces flower number and pod production but increases seed size in chickpea (Cicer arietinum L.)
复制标题
鹰嘴豆 (Cicer arietinum L.) 早期短暂的缺水会减少花数和豆荚产量，但会增加种子大小
DOI：
10.1071/cp10349
复制
发表时间：
2011-01-01
影响因子：
1.9
通讯作者：
Siddique, K. H. M.
中科院分区：
文献类型：
--
作者：
Fang, X. -W.;Turner, N. C.;Siddique, K. H. M.
已知末期干旱会降低花产量，增加花和豆荚败育，并降低鹰嘴豆（Cicer arietinum L.）的产量，但尚未评估早期干旱的影响。在两个鹰嘴豆品种，Rupali，德西类型，和Almaz，卡布里类型的早期短暂的水分亏缺对花和豆荚生产和流产，种子产量及其组成部分的影响进行了评估。使36天龄的植物经受：（i）通过保持水35天短暂缺水，然后再浇水（WS），和（ii）始终保持充分浇水（WW）。在WS处理中，土壤含水量、叶片相对含水量和叶片光合速率在断水后下降，复水后恢复到WW水平。尽管WS处理是在不同的物候期在两个品种，WS减少了约50%的单株花数在Rupali和Almaz，分别与WW植物相比。在WW植株中，两个品种的花约15%败育，Rupali和Almaz的豆荚分别败育42%和67%，而在WS植株中，Rupali和Almaz的花分别败育18%和23%，豆荚分别败育27%和67%。而Rupali和Almaz的WS植物的种子生长主要发生在植物复水后，种子生长的持续时间分别减少了17和36天，种子最大灌浆速率分别增加了3倍和5倍，种子大小分别增加了26%和16%，与WW植物相比。与WW对照相比，WS植物的单株种子产量在Rupali中降低了31%，在Almaz中降低了38%。早期短暂的水分亏缺降低花产量，但改善花和豆荚的发展，增加种子的生长速度，并增加最终的种子大小，并有一个较小的影响，种子产量与鹰嘴豆进行终端干旱。
Terminal drought is known to decrease flower production, increase flower and pod abortion, and decrease yield of chickpea (Cicer arietinum L.), but the effects of early-season drought have not been evaluated. The influence of an early transient water deficit on flower and pod production and abortion, and seed yield and its components was evaluated in two chickpea cultivars, Rupali, a desi type, and Almaz, a kabuli type. Thirty-six-day-old plants were subjected to: (i) a transient water deficit by withholding water for 35 days, and then rewatered (WS), and (ii) kept well watered (WW) throughout. In the WS treatment the soil water content, leaf relative water content and leaf photosynthetic rate decreased after water was withheld and, following rewatering, recovered to the WW level. Despite the WS treatment being imposed at different phenological stages in the two cultivars, WS reduced flower number per plant by ~50% in Rupali and Almaz, respectively, compared with the WW plants. In WW plants, ~15% of flowers aborted in both cultivars, and 42 and 67% of the pods aborted in Rupali and Almaz, respectively, whereas in WS plants, 18 and 23% of flowers aborted and 27 and 67% of pods aborted in Rupali and Almaz, respectively. While seed growth in WS plants of Rupali and Almaz occurred primarily after the plants were rewatered, the duration of seed growth decreased by 17 and 36 days, the maximum rate of seed filling increased by 3 times and 5 times, and seed size increased by 26 and 16%, respectively, compared with the WW plants. Seed yield per plant in WS plants decreased by 31% in Rupali and 38% in Almaz compared with the WW controls. The early transient water deficit decreased flower production, but improved flower and pod development; increased the rate of seed growth and increased final seed size; and had a smaller effect on seed yield compared with chickpea subjected to terminal drought.